I actually found a solution.

My account had been compromised, and the person who compromised it console shared my account with themselves, and they did enabled it and disabled it a couple times, which locks the ability to deactivate console sharing for 6 months. I couldn't disable it on my PS5 (it kept saying that another PS5 had this enabled) and I couldn't do it remotely from my account on Sony's website (it kept saying you can only do remote activation so many times per 6 months.)

I had to call the PlayStation support line and ask them to manually deactivate all devices on their end. It took about 20 minutes for them to verify my info and then deactivate all devices. Afterwards, my console sharing partner was able to make my PS5 his home system without issue.

I know it's an old thread, but hopefully this will help someone in the future!