The Destiny 2 patch was released a week ago. The Destiny 2 XIM config is close to 4 years old (?). Revisions to game configs take time and there are other games ahead of D2 in the queue. The D2 update will account for the revised turn speed, I doubt the Actions section will change.
XIM APEX supports the default bindings for every game, it doesn’t allow for custom Action labels. It’s a device built upon a small programmable chip with limited memory and restrictions apply as a result.
It doesn’t matter anyway - there are only so many controller buttons to go around and all of them are accessible in XIM configs. Short taps can be bound to Primary keys, long holds &/or button combos can optionally be bound to Secondary keys.
Make sure you have the Expert configurations option enabled in XIM APEX Manager > Global Settings to view Secondary bindings.
If you see an X, Y, A, B, L1, LB etc icon in XIM’s Actions, ignore the XIM label for that Action, it’s just placeholder text for the game’s default control scheme, which you should use and just rebind on XIM. But you can bind the controller button in XIM to whatever custom binding you have it set to in D2. The button icon matters, not what it’s called.
For example, bind Super to say X in-game, then bind X to whatever keypress you want to press on XIM, eg V. Pressing V will trigger X which triggers Super.
For Super, most of us simply setup a Secondary binding for L1/LB and R1/RB, just make them both the same button or key, eg V. Dead easy and doesn’t interfere with the default actions for L1 and R1. If you changed the Super binding in-game to L3 + R3, or A + B, do the same thing with Secondary bindings on XIM, eg L3 = V & R3 = V. Press V for Super.