I have holiday rules with my team, works both ways as I insist that they are also not contacted if it can be helped during their time off.
if it’s super urgent - call my boss (he and I are never off at the same time as I’m his back too)
if it’s something only I can answer and critical - send me a LOW priority email (I get a bunch of high priority ones that aren’t, so if it’s marked low, it will be obvious it’s really critical)
I’ll check my email twice a week and respond to low priority mails only.
your texts/WhatsApp’s will be muted.
my teams will be logged out completely.
i’m not taking my laptop, so if it can’t deal with something quickly from my mobile, see rule 1.
I delegate all of my meetings in advance and make sure each person is aware that they have delighted authority while I’m out.
turn on my OOO with delegation contact for each project/customer, making it clear that I will not respond to them until after x date.
and go…ignoring anything that comes my way apart from the 30 mins or so I quietly slip away from family/friends early a couple of mornings a week to check for low priority mails and promptly log back out of outlook once I’ve checked and responded to any I receive.