This is a second version of iPhone 12 Pro Max holder for 52mm photo filter.
Meant to be applied on top of a cover (in this case Spigen Liquid Air, but it could work with others too). Version without any case is here
Print both in 0.2mm resolution and glue them together as shown in the image.
I recommend printing both with PETG, but it works with PLA too - in both cases you need to screw filter in, instead of push-in!
The author hasn't provided the model origin yet.