Detach from work outside work

[bossbossbaby]

I'm really struggling to detach from work when I'm not at work. I've been watching the tv show Severance (where you remember nothing about work outside work) and it's looking like a good idea!

Please can you share ideas on how I can leave work behind when I'm not there?

I stopped checking emails was after 6pm now I don't check at all after I leave the office. Others in the team log in outside of work hours, I've been asked did I see the email X sent at 5pm - my response is either yes I saw it when I came into work or not yet I'm working my way through the inbox.
I dont respond to WhatsApp's from work after I leave the office either.
And the only time I would answer my phone was if it was my Manager's Manager was calling even then they'd have to call twice.

I keep a to do list and before I leave I write it up for the following day.

You need to have bounderies, even at the bottom of emails that state your working hours are between X and Y.

its a job that pays you a salary for working X hours per week. Switch off and enjoy life outside of work.

Thank you!
I do a lot of those things, but seem to be constantly ruminating on what's happened during the day or due to happen the next... I really need an off switch for my brain!