Pandemic is the only thing preventing organized lunch with coworkers. Nothing about wfh prevents it - just agree on a place and time.

Internet is a problem, but a solvable one - assuming you are in the US, we need competition for ISPs. I had ATT fiber for a while and it was for all practical purposes as good as office (symmetric gigabit).

Cycling has been covered :)

Separation - door closed to the space I work in works great for me. When I didn’t have that, putting everything away and leaving the work space for a few hours did the trick - it’s all in mental discipline.