This might no longer be of interest for you but I found myself a case that I like.
The case is called ‘TIANYUE Case for Nothing Phone (3)’ on amazon(.de). Not only does it have all necessary cutouts, also has a (somewhat weak) metal plate for magsafe accessories.

Besides that it has raised corners on the bottom prevent them phone from wobbling on a flat surface

and it even has a small easter egg where NP3 can be read on the AI button

The second metal ring which is larger than the cases came with a magsafe phone holder by ‘SyncWire’, it’s on a ratched and can be folded out twice in order to be used as a stand in any position. Alltogether it looks nicely, and gives me an industrial feel and look
