How can I make certain Sims my uni roommates?

For anyone that comes across this, I managed to do it.

Sims 4 roommates (using Uni debug cheat & Clubs)

• Create roommate Sims
• Move onto empty lot

• Play your main Uni Sim
• Meet all intended roommate Sims
• (Since I personally could not use the mailbox to remove auto assigned roommates, my only option was to make the dorm Affiliate my own GT Club. So, at this point, I had to ask each sim to join my Club. This did not make them automatically become my roommates, I still had to ask them all, but it did stop random roommates from being assigned.)

• Play roommate household
• Use Uni debug (cheat/shift click on sim) to enroll each sim into uni - make sure to set housing “At Home”
• Once you’ve done that for all Sims, go back to manage worlds
• Move each sim into separate singular household
• Make sure sims are “Not in world” (possibly also in “Other Households”, I’m unsure so I did it to be safe)

• Back to main sim
• Make sure you are NOT in dorm, go to different lot
• Invite roommate sims to hang out
• Ask to be roommate will come up now

You’ve got your own roommates!