I've only ever left jobs while working in office. In those cases it's usually sufficient to talk to my manager and news spread pretty organically amongst the people present in the office.
Now I work remotely and I'm about to hand in my notice and I'm wondering communicating departures works in the context of less organic news spread / chatting needing to be initiated explicitly via slack messages etc.
The company is pretty small (<30 ppl). I've personally only worked with a couple of them though and interacted at all with maybe 7 other people. More recently I've been work on a project alone.
Do I post a message on the general company-wide slack channel? Do I reach out directly to people I've worked with? To the ones I've interacted with? Or similarly to working in an office, do I just inform my manager and let them spread the news?