My last job was remote with some fantastic people, but as time has passed and the company hasn't done incredibly well, people have scattered (including myself) and I've found it tricky to keep in touch. I'll video chat with some of them once every few months online, but I only have contact with some of them this way.
For others, it feels like the best contact I have is LinkedIn messages. It's usually a quick exchange about how they've been, if they've been up to anything interesting, how the kids are, and how work is - but it's all fairly brief.
Maybe that's fine? Would love to hear if others have better ways to keep in touch with people they enjoyed their time with, but no longer see on a regular basis or live anywhere near.