Obviously those people who already have offers will likely be given preference...if you firmed it, and get your grades you should be in. I highly advise letting your school know, what your offer is and where you want to go....this is not a time to be unaware of what is going on around you with your situation.
Secondly, will universities even have physical classes next year..
That's the big challenge...but as soon as the better uni's (RG are full). They won't accept more students and what's left, will fill up the lower ranked uni's. It happens all the time, I'm not sure why uni's/applicants don't think it will happen this year. Also people will want to go to uni as the economy is totally decimated. It may well occur some people with higher exam results don't get into a uni they normally would have and end up somewhere mid tier. To that i say oh well, serious people plan ahead. If you don't hold an offer to the uni you want to go to at this point, or haven't submitted an application... Whose fault is that? Your own.
I'll give you a good example, alot of my friends are upset because they have high 50s average.... And my uni has enacted a no detriment policy meaning your grades can only go higher so those of us with solid 2:1s (my average is around 67 right now) arent at all worried. Which is great, those with lower marks don't see the advantage and say we're forgotten, yeah but that's because they weren't switched on and prepared before covid-19, hence their lower average. People that plan ahead in life and are performing well at all times get better results. Even if there was no way to anticipate for covid-19... You should have been prepared with an offer at hand by now.