Could I be playing on 1.16 and run pre 1.16 gor obtain all discs im on console so I cant change versions

No

Yes of course you can, as well as you can run let's say "obtain pre 1.16 ores" even on the 1.16

yea u can, same way many runners run all wood types pre 1.9 in 1.16 so sure - It's allowed

Can you submit a set seed speed run when you did it on a random seed because I would get 5th on set seed but 8th on random seed?

@MookieMonkey498 1)how can a time be better on a set seed than random seed 2)the time for 5th on ssg is impossible to do on a random seed 3) you cant submit a run to set seed if you didnt 'set a seed'

It's probably a level run like obtain item