Welcome to the community!
I know that back in March or April this subject came up and there was a whole strand of conversation around this. I’m sure that things are better understood than they were at the start of the pandemic and medical views may have changed but there was definitely something around people having cerebral palsy being more susceptible.
This was the conversation we had back in March/April: Coronavirus/Covid-19 Discussion
In particular, I found an association of British neurologists article Coronavirus/Covid-19 Discussion - #21 by DickD
So, there are increased risks for some neurological things: it probably depends on what your AVM affects as to whether this is relevant to you.
Hope this helps,
Richard