Will Magic Kingdom reach capacity at Christmas?

Going for Christmas - I know it’ll be busy. Concerned about Magic Kingdom reaching capacity on Christmas Day and not getting in - does that happen anymore? I know they used to have phased closures and you could get in with dining reservation etc. Not staying on site. If I buy Multi Pass or Individual Lightning Lane would that pretty much guarantee entry?
Don’t ideally want to go at 9am but I will do if its necessary

When I was there pre-covid mk closed by 10am on Christmas day.

Anywhere on Christmas day, I would plan to go early.