I think you have to make a routine, rather than hoping one is provided for you. I am not a routine person, but for me showering, opening up Slack, and switching Chrome profiles is how I transition from "home" to "work". I don't do "home" things during work hours, and I don't do "work" things during "home" hours. Even though I'm at the same desk. For me, it works as well as commuting did, without 30 minutes of being frustrated at the subway.

(I admit that I do do some "home" things at work, like laundry. That mostly involves turning on the machine and tending to it in an hour, so not a big time commitment but nice to get done during the day.)