Personal OpenCore EFI for macOS Big Sur 11.3/macOS Monterey 12.0 on HP Elitebook 830 G7, HP Elitebook 840 G7, HP Elitebook 850 G7. Should work on any 8X0 G7.
Why do you think that https://github.com/geek5nan/Hackintosh-XPS7590 is a good alternative to HP-Elitebook-850-G7-Hackintosh