I’m not sure how many volunteer opportunities like this there are, but I’d check the EA Opportunity Board, which collects “everything short of permanent positions” (see Airtable — the normal interface seems broken for me right now). You should be able to filter “opportunity type” for volunteering, and “location filter” by whatever works for you (or not remote). (See also the 80K job board, which doesn’t tend to focus on volunteer opportunities.)
I’m not sure how many volunteer opportunities like this there are, but I’d check the EA Opportunity Board, which collects “everything short of permanent positions” (see Airtable — the normal interface seems broken for me right now). You should be able to filter “opportunity type” for volunteering, and “location filter” by whatever works for you (or not remote). (See also the 80K job board, which doesn’t tend to focus on volunteer opportunities.)
You might also be interested in exploring events.