As long as you get accepted into the school, and as long as you meet the basic requirements like having enough money to support yourself and stuff there generally shouldn’t be a problem getting the visa approved. But the processing time is a killer. I’ve seen Migrationsverket take so long to process the visas that several students had to start their masters program a couple months late. The university did allow them to start late, but they really really struggled getting caught up and quite frankly the school shouldn’t have allowed it because there was really no chance of them succeeding in the program because of it (this was prior to Covid and there was no remote option for any of the coursework). Those students were really screwed over and would have been better off deferring enrollment until the next year. But the department was desperately lacking funding and needed to get as many people enrolled as possible. So they were maybe a bit dishonest about how much of a challenge it would be to get caught up.

Anyways, submit the visa application as early as you possibly can and hope the Migrationsverket processes the application quickly. Otherwise you’re at the mercy of your school and whether they’ll be willing to let you start late. Im assuming post-Covid you’d be able to attend classes remotely, so at least you wouldn’t have the issue of falling too far behind and flunking out…