Can't get AltStore to work no matter what

For context, I had a few apps installed on sideloady before. I uninstalled sideloady, but still have those apps installed through sideloady installed on my iPhone. After uninstalling sideoady, I uninstalled, Apple devices app, iTunes, iCloud and reinstalled them (not using Microsoft store for iTunes and iCloud). Then install the app. I see that Install > iPhone shows up. It asks me for my iCloud Username and password however. I am seeing this. I have tried reinstalling EVERYTHING again and restarting, but no luck.

https://preview.redd.it/w4vkl3llgw5g1.png?width=1411&format=png&auto=webp&s=d34393245ffd8d90c3541a8bd56b71f77808bcdf