Update: Problem with access to buttons resolved by moving receiver holder to the back of mobile holder. Use Xbox_360_wireless_controller_mobile_mount_new and Mount Phone Clamp B with Tab v6 with receiver holder.3mf files instead.

For mobile mount use Modular Mounting System

Unfortunately there's a bad access to LB and LT buttons, but it's usable.

Note: The .stl is old version.
I haven't personally printed the new version, but it should be better.

Creality

Ender 3

No

Yes

0.28

20