that would be cool and i think it should be possible to create a mod that would do that - although I have no practical knowledge as how to do that
So to answer myself, I just found out the developer already included that feature in 0.7 🫣
Somehow I completely missed that "mod" folder already included 🫠
level_up_increase_lock_timer.mod.tscn does almost exactly that, it adds time to the lock if you're running a collection that levels up.