For the team I am on maintaining virtual office hours has really helped in this respect. One or more (but at least one) senior+ person just working/hanging out

For the team I am on maintaining virtual office hours has really helped in this respect. One or more (but at least one) senior+ person just working/hanging out in a zoom call where others can drop in and talk about whatever. With remote teams you have to explicitly solve this issue rather than just having it happen like it does for healthy in office teams. But, it isn’t like this is some unsolvable problem.