1. Providing useful context up-front
2. No "hello" message sent while waiting for further input to be typed in
3. More emphasis on written communication
4. Less of a need to jump on a video conference
5. Use of headsets for video conferences
In some of the latter cases, the "office-first teams" still had management working out of the office and I believe that remote employees are kind of second-class citizens in these cases, and I found it less enjoyable and less productive to be a remote dev in that sort of situation.
I believe also that headsets for video conferences allows for full-duplex conversations where one or more people can talk at once and be heard, but I've not seen anybody else talk about this and may be wrong.