The reverse works fine too. Just make sure you're on a full GPT partition scheme. On my Toshiba laptop, I installed macOS with OC on a disk with an existing Win10 installation and never lost anything. As long as you follow the recommendation/guidance (cf. Dortania OpenCore guide), you'll be Ok.
HP 840 G3 100% working on Monterey. Somehow there is no AppleALC 1.6.2 kext to test.
So, the workaround is to include -alcbeta in boot-args
Kudos to JakeLo
Checkout working EFI