For context mine are nearly 7 & nearly 15
have a tablet - have a family tablet they could use from 4, own tablet DS1 got at 8, DS2 about to get one at 7 (lots of controls and limits though)
have a phone - secondary school with limits
play date without you staying - 4
go outside to play without supervision - we have a huge enclosed garden that is very safe so let the youngest go out from 2 with me popping out now and then to check on him, then from 4 without checking so much
cross the road - our road has no pavements and is a quite fast country lane where people often ignore the speed limits so DS1 was about 9 before I let him cross it on his own
have a sleepover - ds1 had his first one at 8, ds2 hasn't had one yet but I suspect any time from now (6)
He camped with beavers earlier than this though.
Fully bath/shower themselves
DS1 from 7, DS2 from 6
go downstairs in the morning without you getting up
Both from 3
make their own breakfast
Both from 4 have set everything up so it's easy for them to do this although sometimes need help with milk as we get the big 6pint bottles