Great issue you have raised. We have basically managed one whole PMI process remotely (already before COVID 19 and had just one visit onsite) for one deal. Worked well and we used common tools as slack/go2meeting/zoom for communication and for project tracking google suit/JIRA/box.com and similar tools. Speaking of missing interaction/visiting people physically bringing people/different cultures together is indeed a tough one, but there are ways to entertain staff even using zoom or other virtual comms tool with some interactive entertaining initiatives “get your peers know/virtual team building etc, what can really be fun. But in the end we are all human individuals and might feel more comfortable (“breaking the ice”) when meeting and interacting in person.