So there is hope after all that the company still tries to listen to its customersAfter upgrade my Oneplus Nord from OOS 22.214.171.124 (EU) to F.11 (A12 Global) without any problem, noticed that for first time my phone recognize G5 Network in Swiss (Swisscom and Sunrise).
I have this phone since almost 3 year (2,5) AND IS THE FIRST UPGRADE that does it.
I have tried some custom roms (PE based) but without luck in Swiss.
I had each time to change policy.xml to see G5 networks.
I hope the next upgrade F12 will optimize some minor bugs.