Lots of Ukrainian refugees have gone home now already. Partly because the Russian left the north and around Kyiv but also because living in Poland or wherever is not fun.
I lived in hostels whilst travelling. I soon learnt to avoid rooms with more than 8 beds. I did a 30 bed mixed dorm for one night. It was dreadful. And actually quite scary (lone female traveller). I paid more and switched to a small room the next day. Living in hostels is stressful. Particularly at first when you don't know anyone. I found it got easier after you made a few friends but it also was very difficult at times. You have to be able to tolerate the dickhead that comes in at 2am and switches on the light for example. Then there's stuff like sharing with someone you know is talking about you but in another language with their friend. That can be uncomfortable... Refugee halls both within Ukraine abd outside Ukraine must be just awful to live in for any amount of time.
Strangely the experience taught me a lot. Not least that the guy who drove me nutty and I couldn't stand for the first couple of weeks was a really decent bloke who I completely misjudged at first. 7 months later we were good friends. None of the people I stayed with for months were ever people Id ever normally hang out with. You have to just really go with it. Somedays the lack of privacy and the feeling of being in a crowd but utterly utterly alone was overwhelming.
Crucially theres a massive difference between wanting to do it and being forced against your will to do it after having experienced trauma and everyone else around you being traumatised. And there being young kids in the mix. I just can't imagine it.
With regards to the UK situation, I think the other worrying thing for me is that the visas are three years. Then what? You can't apply for indefinite leave to remain as a refugee until after 5 years.
If you want to stay then you've got to change visa. Including any costs to do this.
How is someone who has come here, got a min wage job and struggling financially supposed to do that?
Equally how do they afford to return to Ukraine? And to go to what exactly when they return home? Even if the Ukrainian government win the war tomorrow they are going to have housing problems and problems with unexploded ordnance.
Again if you are hosting and are thinking about this and considering this in terms of what information and advice you give to your guest (and what support you are prepared to give) you are maybe going to run into issues.
I think a lot of the people I've seen volunteer to host are v middle class but also have had pretty sheltered lives. I don't see a lot of the thought going on that should be. Lots of virtue signally but not really consideration. Most haven't been to Eastern Europe and few have travelled independently and have little idea about culture differences beyond package holidays. The idealism is kinda frightening tbh.
I have no doubt for some it will be a really positive life changing experience. For others, a nightmare. One that I don't think you can vet for nor match properly on interests etc. Its either going to work or its not. You have to be exceptionally patient and laid back. Not sure many people really are.