I've got a Wing Alpha eSim (playing with AT&T service) and have not been able to get 5G no matter what I turn off/on. Meanwhile my T-Mobile and Visible sims get 5G even in dual-sim mode on 14.5.Works great on 14.5! Ironically, picking up 5G now where it would only show 5ge when I turned off one of my lines. Battery life on par with 14.4.
I need to check the AT&T 5G coverage site to test this out before my Wing Alpha sim expires.
Update: Yep. The part of town I was testing doesn't have AT&T 5G :/ Will have to drive 10 min west later today to test AT&T.