We cosleep at home so do the same when we’re away. The few times we’ve stayed at hotels I ended up rearranging the furniture so that something like an armchair was up against his side of the bed to make sure he can’t roll off. With airbnbs when I was deciding which ones to pick I focused on the bedroom layout and went with the ones where the bed was against the wall or could be moved or there was some sort of furniture that could be a barrier
I'm wondering the same too as we are going away in a few weeks. I've seen you can get foldable bed guards which might be an option