I'd say the basics are things like:
Encouragement of regular breaks and a culture that it's OK to step away from your desk and not be 'green'/immediately contactable for short periods to sort out your kids home-schooling/quiet pets/do a load of laundry/have a fag/scream into your pillow 
(obviously without taking the piss with it). Encouragement to take a proper lunch break, get some exercise, eat properly in this time. We have '1 to 2 for you' in place now where that time is blocked out in diaries and we are strongly discouraged from booking meetings or calling people over that hour so people feel free to take a break...
Keeping an eye on staff working hours and encourage people to actually turn their PC off and walk away after work, discourage the sending of emails/calls/texts after hours unless truly urgent (or set clear expectations that if these are sent e.g. for time zone reasons, there is no need to read and reply until the next working day unless flagged as urgent). A lot of people seemed to turn their previous 'commute' time into working hours in the last lockdown (so instead of working 9-5 with an hours commute they were working 8-6) and now it's seeping even further out and so they are starting 7.30 and working until dinner time, now whether they are really flat out working all that time or just firing off the odd email etc whilst doing other things at home I suspect varies, but the more people do it the more it's seen as the norm and other people feel they need to too...
Getting everyone properly set up with appropriate seating and equipment, issuing advice about how to position yourself and your screen etc to minimize strain.
Keeping regularly in touch with your manager and team, encouraging communication about workloads, any difficult customers or situations, feelings of stress etc . Give opportunities for 'venting' an to seek advice and support - the sort of thing that would naturally be noticed or easy to casually mention if you were all in the office but which can feel more pressurised and build and build when you're at home alone. Also (and I feel my work has recently gone a bit OTT on this) but opportunities for casual social meetings, virtual 'pubs', 'check-ins' etc where you purely talk non work are a bit of a lifeline for some.