You can now install macOS.

If you want to preform a clean installation, format the Mac's internal drive with Disk Utility.

Please note that you cannot erase all partitions if OpenCore is installed on your Mac. For example, if you erase "Macintosh HD," the EFI partition will be left untouched and OpenCore will be fine. However, if you erase "Apple SSD," that will erase Macintosh HD, Recovery HD, and EFI. Your Mac cannot boot if the EFI is erased.