On Facebook, I read this:

Jim Lyons
Feb

Ukraine’s Air Force says a pilot flying a Ukrainian Sukhoi
Su-27 downed two Russian Su-30s in a dogfight. Unconfirmed,
but apparently the Russians are using some Soviet era planes.
The Sukhoi is a later generation of fighter plane.

Hmmm, I did find this:
https://taskandpurpose.com/analysis/ghost-kyiv/

‘The Ghost of Kyiv’ is the first urban legend of Russia’s invasion
of Ukraine
I want to believe.

BY JARED KELLER | PUBLISHED FEB 25, 2022 12:27 PM

A Ukrainian MiG-29 fighter jet. (Task & Purpose photo illustration)
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As Russian missiles burned across the horizon and military aircraft
prowled the skies above Kyiv, digital whispers of a lone airborne hero
among the Ukrainian resistance began to emerge online. His name and his
history are shrouded in mystery, but his exploits are already the stuff
of modern military lore: that, with six air-to-air kills, the heroic
pilot of a Ukrainian MiG-29 became the first air combat ace over
European soil since World War II.

They call him ‘the Ghost of Kyiv’ — and despite thousands of digital
prayers to the contrary, he is in all likelihood a work of fiction.

Based on digital activity, the first mention of the ‘Ghost of Kyiv’
appears in a series of three tweets showing a lone Ukrainian fighter jet
operating over the capital:

These original videos were retweeted thousands of times, many of which
contain messages citing ‘reports’ of a Ukrainian fighter downing several
Russian fighters in air-to-air combat. Like most modern urban legends,
the story was further propagated online by tech bros and
lawyers-turned-Twitter-muses with large social media followings. The
story only grew from there, so much so, in fact, that Spanish newspaper
Marca claimed that the Ghost of Kyiv had downed two SU-35 fighters, a
SU-27 fighter, a MiG-29 fighter, and two SU-25 aircraft. Even the
Ukrainian Ministry of Defense appeared to feed into the story, posting
footage of a MiG-29 besting a Russian aircraft that was later revealed
to be from a flight simulation program.

At the moment, however, official confirmation of an air ace — the term
for shooting down more than five enemy aircraft — from the Ukrainian
government is, for lack of a better term, extremely sketchy. While the
Ukrainian MoD on Friday hyped the story of an “air avenger” above Kyiv,
the Ukrainian military’s projected Russian losses in the first two days
of conflict only amounted to a reported 10 aircraft, many of which were
likely downed by Ukrainian air defenses with the exception of two
Russian aircraft that the Ukrainian Air Force claimed were downed by a
Ukrainian SU-27 in a dogfight. ​​Indeed, a senior U.S. defense official
told reporters on Friday that Russia had not yet achieved air
superiority, and that Ukrainians “still have air and missile defense
capability, including aircraft … in the air that continue to engage and
deny air access to Russian aircraft.” This makes the possibility of a
sole air ace out of Ukraine’s potentially 98-strong fleet of combat
aircraft highly unlikely.

In addition, it’s worth noting that air-to-air kills are a relatively
rare occurrence in modern warfare. The most recent known instance was
the shootdown of an ​​Armenian SU-25 warplane by a Turkish F-16 fighter
jet amid clashes between Azerbaijan and ethnic Armenian forces over
breakaway territory Nagorno-Karabakh in September 2020. Three years
prior, a U.S. Navy F/A-18 Super Hornet shot down a Syrian SU-22
fighter-bomber above Syria in the U.S. military’s first air-to-air kill
since 1999. Sure, there hasn’t been a major war on European soil since
the Yugoslav Wars of the 1990s, but the idea of a lone fighter scoring
six air-to-air kills in a single day (and in the first day of fighting,
no less!) for the first time since World War II seems extremely far-fetched.

Here’s the problem with the Ghost of Kyiv. Every atom of my body tells
me that this story is 99.9% bullshit, an ingenious piece of organic
digital storytelling that morphed into a convenient grassroots
propaganda narrative. But amid horrific images and videos of Russian
aircraft allegedly firing missiles at civilian populations, I want to
believe — and I know I’m not the only one.

Every conflict gets the heroes it deserves, and that goes for legends as
well — like that the 19th-century pirate Jean Lafitte was a battlefield
hero for the United States during the Battle of New Orleans in the War
of 1812, or that Mr. Rogers was a deadly sniper in Vietnam (He, in fact,
was not). As the conflict in Ukraine stretches on, it’s clear that this
war will be no different. The Ghost of Kyiv may be a specter of our
imagination, conjured into being from three disjointed tweets, but that
doesn’t make what he represents to the people of Ukraine any less real:
defiant resistance in the face of certain doom. Perhaps, in that sense,
the Ghost of Kyiv is real enough — for now.