Well, currently we already have 23 races in calendar and according to current contract it can't exceed 24 races. So, some talks already started about removing one of current tracks from calendar:
https://the-race.com/formula-1/which-gps-are-at-risk-as-vegas-forces-f1-calendar-rotation/
Monaco, Spa and Paul Ricard is at risk to be removed. Ok, I wouldn't miss French GP, I don't see removal of Monaco very likely, despite that's impossible to race there. But if they will remove Spa because of this track, I will be mad.
BTW, Las Vegas GP race will be on Saturday, 10 PM local time. I think it means that race will be 7 AM on Sunday in most of Europe