You've already acknowledged that most of the issues you encountered are specific to your phone or carrier. For example, eSIM works fine with 5G on iPhones and in my experience there is no delay to activate an account. I've set up multiple phones on eSIMs and never experienced something like that.
Regarding backing up, yes it would be nice if you could backup your eSIM alongside the rest of your phone contents, however the real solution is just making it easy to provision a new eSIM.
In my experience, if I need a new eSIM I just open the carrier app and reinstall it to the phone.
Regarding backing up, yes it would be nice if you could backup your eSIM alongside the rest of your phone contents, however the real solution is just making it easy to provision a new eSIM.
In my experience, if I need a new eSIM I just open the carrier app and reinstall it to the phone.