@ICEGalaxy
I used your EFI and added up the latest Bluetooth Firmware:
BrcmPatchRAM-2.5.4-RELEASE
Trackpad is working, Bluethooth works even the SD Card Reader works.
What I did as well is the ACPI I added my own generated once to your once.
See attached the EFI Folder
EFI Ende4711 ver 20200829.rar BrcmPatchRAM-2.5.4-RELEASE.zip