Legacy-Kexts VS AlpsHID

Try adding SATA-unsupported https://github.com/khronokernel/Legacy-Kexts/blob/master/Injectors/Zip/SATA-unsupported.kext.zip

I would guess SATAUnsupported.kext, but you should check here and make sure you've disabled anything unsupported, such as IRRT, hardware, etc. Again, I have no idea what your hardware and OC configs look like. Maybe start fresh, and open a new thread? You mentioned using the same files for your Clover and OC configs, and can personally tell you this rarely works right.

SATA-unsupported

For Catalina, You should use this kext instead SATA-Unsupported(opens new window)

Thanks for the tip, I tried installing SATA-unsupported.kext and AHCIPortInjector.kext

ATAPortInjector

I took a look at your EFI, and I don't see any obvious errors in the config.plist. Concerning the ACPI, I don't think a valid EC is required in macOS prior to Catalina 10.15; thus, SSDT-EC is unnecessary. Concerning the Drivers, I don't think Ps2KeyboardDxe is required. Also, why use VBoxHfs-32 instead of HfsPlus32? I am curious as to where you got most of your kexts; USBInjectAll only works on El Capitan 10.11 and above, and I don't think IOATAFamily nor SATA-unsupported are required for your laptop; does your laptop even support AHCI or SATA?. AHCIPortInjector and VoodooHDA, I'm not sure about (for the latter, I think you should be using VoodooHDA-FAT). The others look fine, though.

Try using https://github.com/blankmac/AlpsHID/releases/ instead of VoodooI2CHID, keep the VoodooI2C kext though, use the supplied VoodooI2CHID in AlpsHID.

AlpsHID

You might want to try: https://github.com/blankmac/AlpsHID. The Latitude 7490 seems to be supported with working buttons.