"Development Build" all over screen- APK

Wanted to share my APK with some friends and while it works for 90%. Atleast 2 devices seem to struggle to open my APK. (Screenshot )
Working devices: Pretty much every newer Samsung Phone tested (including the newest X20)
Didn’t work on Oneplus 5t and a random older Xiaomi Phone.
I’m using the newest version of Unity.

Pretty new to Unity so I’m not sure which informations else to share.

Same issue for me on a Lenovo Tab M10 using Unity 2020.1.1f1. If running with URP the screen is just dark blue (background color?).