Depends where you start (and therefore how late in the day you get to France)
init. We’ve friends in Deal (nr Dover) we stop over with, and so can get down as far as Dijon fairly easily though with an inevitable beer and red wine headache. Which reminds me of the year immediately pre-covid when I forgot my passport. This came to my notice when we were sandwiched in the queue three cars away from check in, when my wife said “have you got your passport?”. Er, no.
They basically just waved us on anyway, quick call to the boat to check it was okay “you alright to export this numpty?” probably being the call. Didn’t event slow the line. I was advised to have a passport for getting back in and that was it, though we’d still not quite left the EU at that point. Sad.
It’s possible the day will come when my wife stops reminding me about this. Anyway, Dijon is a solid recommendation if you’re at dover early. This year we’re heading basque country again, and I need to book somewhere in or about Tours, our favourite place (caves by the Loire) already having booked up.