In 2023 it is extremely dangerous to stay on the frontline with a medium protection vehicle like an IFV. Even defensive use of tanks devolved to hit-and-run tactics. Modern ATGMs are truly dangerous.
Geolocation ?
That would be highly classified, and any Polish/NATO "PVA" support would likely be Chinese-style assistance to North Vietnam (i.e., operate air-defense, repairing, engineering, logistics) behind frontlines, rather than Chinese-style assistance to North Korea (i.e., frontlines combat, direct engagements) to reduce likelihood of POW capture and diplomatic incidents. I'm sure there are instances of foreign adventure seekers (like the British dude or South Korean dude) playing soldier for Instagram likes on the frontlines, but they don't last long once the reality of war sets in. The frontline is cold and brutal, they quit once the going gets tough and without fire support or air support they are used to.
I think the U.K admitted they had SF operating in around the Capital when the Russians were fighting around there which sounds pretty close to direct involvement similar to Russian SF in Syria this one link about that
The says they were sent to protect embassy/consulate officials, no combat role. This occurred in April, around the time Russia withdrew from Kiev, and UK restored it's diplomatic mission in capital. This is one example of a sensationalized title to gather clicks and views.