OnePlus 12 DOES work with VoLTE

Hi, my previous phone was not passing the VoLTE test. I wanted to buy a OnePlus but I was scared because they weren't on the list. I'm writing this to testify that I bought the OnePlus 12, and it passed the VoLTE test.
Note: at first it didn't work. I had to install like 5 updates in order for it to work. So if you try and it's not working, don't just return the phone. Do all the updates you can, and then meddle with the VoLTE settings.
Bisous