yeah, probably just watch out for them on the streets. if there is ukrainian refugees around there is a good chance if they can, they will bring their cats with them. the breed originates from an island in northeast russia near finland, called "archangelansk" and they really are angelic cats.
i saw them appearing and proliferating in several cities in bulgaria and serbia. they do very well, very superior genetics, robust, strong cats, and bold as brass.
they are probably the premiere cat breed for ball games. they will chase after anything you throw in their sight. it's hilarious. usually they will bring it back to you fairly soon after and you can steal it from them and do it again.
when i was living in serbia, we had one around for a while, he got called "putsi" and every so often he would race into the computer lab and hide behind my colleague's monitor. there was a nasty incident in which he got a massive slash beside his tail, which we presumed was because he is so daring he jumped and slipped and fell on a pane of broken glass, and that he raced in to escape who we think was his daddy. there was also a cute female one up the street around the corner who had a litter at one point near that time, she was a classic queen.
eventually he disappeared, but we were pretty sure that a neighbour adopted him for whatever reason, and at one point we both saw him about 5 doors down. but we didn't bother with it. my colleague was not really that serious about cats, he just let them run about and fed them. this little russian blue he just kinda showed up and hung around and then disappeared again.
with cats you kinda have to get attached to them or they will just wander off. i mean, sure, you feed them, they will show up for that, but you have to smooch with them or they don't get attached to you, and even if you do that, things can happen and they will just decide that the next door tom is too much of a problem and go find their own range. neutering and confining them indoors is pretty much essential especially if there is any strays in your area.