Probably around 3-5 minutes, I did some chores in the meantime to then realise it actually worked. So, it works but it’s such a huge delay coming from 0.20.4
Also the app I’m sideloading is again listed under my developer accounts name which in turn ranks at the last position in the App Library whereas with 0.20.4 I had it somewhere else and definitely not in the library tab of my developer account. In addition, I was asked to trust my developer account - something that wasn’t required with earlier versions.
All in all it still works but these are the changes I’ve noticed with the newer version.
Edit: maybe if that’s relevant - I initially tried to sideload the same ipa as with 0.20.4. the long delay remained even after uninstalling the sideloaded App and having a „fresh sideload“.