Hmm, I just noticed that your mod also has animations for flying hands-free, but whenever I'm flying in my SE playthrough I only ever see the animations where Emberthal is holding a gun. Is that intentional or a limitation of the Jetpack mod?
Intentional I'd say?
For context: the base mod (without the compat part) simply tells the game "hey, replace all armor sprites with those custom sprites". No script whatsoever during save. The game engine decides what and when to draw, not me.
For the jetpack compat, the mod suddenly has to decide what and when to draw. I tried adding "landing" and "takeoff"; I didn't like how it integrated with the jetpack and scrapped the idea of multiple anims since the jetpack only has one anim and that anim has a gun. The idea of adding "idle in air" without the gun simply didn't come to mind due to the previous attempts and due to the change in approaching the issue.
In any case. If the game has a way to detect whenever a player is in combat or not, then nothing stops it from being a thing, technically.
Buuuut I don't think I'll add it to keep it simple since it's compatibility code and I kinda decided "jetpack only has gun, so I'll give it gun and only gun". Who knows, maybe I will at some point in the future.