MSI GF63 Thin 9SCXR - Booting BigSur! Couple of problems though?

MSI GF63 Thin 9SCXR - Booting <a class='btn-link text-primary' href='/2020/12/install-macos-big-sur-on-supported-pc.html'>Big Sur</a>! Couple of problems though?

MSI GF63 Thin 9SCXR

Successfully booting Big Sur! However...

Can't boot without USB EFI? --- help wanted please:
MSI won't show the OpenCore SATA HD as a boot option after updating EFI. Checked BIOS settings and updated without Success . Full OS install boots fine from USB OpenCore. Hard drive won't show as an option in BIOS? Separate windows NVMe booting and showing fine. (Windows EFI as a OpenCore replacement will show 2nd Harddrive)

Other problems:
- no battery status (read I need batt.aml)
- no on board sound yet
- trackpad not detected, however semi-working but won't left click (read this could be battery AML related) will try sorting USB config.

Working:
- Bluetooth
- WiFi
- Display brightness

This is my second OpenCore build; Success' href='/2020/12/install-macos-catalina-on-supported-pc.html'>Catalina AMD desktop first attempt was far easier I have found. Laptops seem slightly more complicated? (integrated battery/keyboard/mouse)

Author: @ZOIDO