Thanks to the great work by @gleonard3 have found this prints easily.

Have printed at from 0.2mmm layers to 0.08 and both have worked out great - both in Elegoo PLA

Printed at 15% infill and has worked out well for strength and ability to get on and off of phone.

Photo is from the Instax Mini Remix I made but the edges are exactly the same - https://www.printables.com/model/1014999-google-pixel-8-pro-instax-mini-phone-case