In my opinion, establishing habits - whatever works for you is best - to mark the start and end of you workday is the most helpful thing here. I have a dedicated home office but I also use that for private projects, but I think there are also room independent solutions - such as putting your laptop in a bag or a drawer once you are done.

Also: give yourself a reason to stop working in the evening. I almost naturally developed routines at the start and end of my workday: - Alarm rings every workday at same time

- Might slack a little off on Social media, then get up

- Get dressed appropriately for video calls

- Make breakfast, coffee, grab a bottle of water

- Take those things into Home office, start working

- Work throughout the day, get up from time to time to get coffe, water, have lunch, maybe throw some laundry into the washing machine - however, not more chores during that time!

- When it's time to stop working, close all programs, put Laptop to sleep or turn it off, turn of external monitor

- Get out of the home office

- Immediately after stopping to work, either do some chores or hit a workout (Reason to stop!)

- Done. Mind is off of work. Have dinner and/or do whatever is planned for other free time

EDIT: Formatting, wording