It might be worth joining a car specific forum or Speak EV.
Two things about charging over 80% for most EV’s, the battery doesn’t like it and the charge curve tapers off after 80%. That is to say, it becomes so painfully slow to charge over 80% you would be better off on a long journey driving for 150 miles (or whatever) and then charge again. That way you will always be charging at the fastest part of the charge curve which keeps the journey time down.
I haven’t heard anything about charging restrictions aside from car park restriction rules. You should be able to get to 100%
The more electrons you need the longer it will take. So charging from 1% will take longer.
And I hate to be the grinch, but best of luck getting 222 WLTP miles, especially in winter. But I guess you already know that.
Well done on getting an EV.
Skoda Enyaq Race Blue