There is a very good solution to that: have a Google Meets or whatever room that is always open and that anyone can join when they feel alone (maybe team based)

There is a very good solution to that: have a Google Meets or whatever room that is always open and that anyone can join when they feel alone (maybe team based). For some people just seeing the faces of co-workers while working can help quiet a lot to not feel alone. Plus they can see you working so you feel social control. It is also super easy to have a quick chat whenever you want to as you can see who is in deep concentration and who is available. People that don't feel like being social can stay out of it. In practice, nobody is fully extroverted or introverted, so people can do whatever mixes their current needs. DO NOT MAKE IT REQUIRED. That will ruin it. I am always shocked that people still haven't figured out how to do remote properly.