> I’ve been using Maps.Me, which is great.

I heavily suggest to switch to https://organicmaps.app/, which is a maintained fork of Maps.me, without user tracking and the whole wallet shenanigans.

More specifically, here's how to enter a bench into OSM: https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dbench

You can just enter an amenity:bench poi, but it's useful to include additional information in tags. StreetComplete, for example, has a quest that adds the backrest information.

Osmand lets you add pois, but offers little guidance which tags are appropriate for which kind of poi. Every door seems a bit more helpful in that regard.

I'm glad there are people in this world concerned with tagging not just benches but also their backrest information.

I should add that when you add or edit a bench in Every Door, it shows the backrest and the material attributes at the top. So hundreds of benches in my area have these mapped :)

EverDoor uses https://github.com/openstreetmap/id-tagging-schema to facilitate mapping, meaning some suitable tags to the main tag are automatically suggested.

Absolutely! I agree with another user that you should switch to Organic Maps, but if you want to do more mapping, Every Door helps with that. It uses iD editor presets, so you can contribute even without knowing OSM tagging, although that would help.