EFI upgrade instructions are given here.
To receive OEM updates, set SecureBootModel = Default (OC, risky) or go to App Store and search Ventura (or newer macOS).

2023-03-06

Supported macOS Version: 10.15, 11, 12, 13.0 - 13.3.1 (a)

Upgrade

• Update OpenCore v0.9.0
• Update Lilu v1.6.4
• Update AppleALC v1.8.0
• Update VirtualSMC v1.3.1
• Update VoodooPS2 v2.3.4