I agree with @Milliardo06 that it would be nice to have as a tag on titles, like “gender-choice”, “non-binary inclusive” etc.
It’s not always easy to tell and I think there is some fatigue among some readers with big giant series that won’t be finished for years (No? Just me?) and sometimes you just want to easily see at a glance what your options are for WIP titles or games where you know you’ll be getting a full and complete story in one-go.
Sometimes you just want to scroll through a list and not have to dig or ask questions to find out if you are going to get smacked with a “To be continued!” at the end of the book.