MountEFI VS ProperTree

You need to manually copy the EFI folder from your pendrive to your system's EFI partition. Use MountEFI made by u/CorpNewt to mount your system's EFI partition.

Use MountEFI, and follow the instructions from this guide.

It's a red flag that GUID_partition_scheme is not displayed under Type on diskutil list for my Ventura install (but it's displayed in Disk Utility, I can see GUID Partition Map on Device Information => Scheme for Ventura partition). The EFI partition is also not displayed in my Ventura partition on diskutil list, which is weird, because I'm able to use Mount EFI on it.

Once I added the "BlueToolFixup.kext" in the EFI folder (using MountEFI: https://github.com/corpnewt/MountEFI), it was time to update from macOS Catalina to Monterey. The update process was successful, and after disabling SIP (as instructed by chris1111 -author of Wireless-USB-BigSur-Adapter-.), everything worked fine.

MountEFI

For booting without USB stick i just mounted the EFI partition of my boot drive and pasted there my entrire EFI folder from the USB. To mount the EFI partition i used MountEFI script. Link to MountEFI : https://github.com/corpnewt/MountEFI

If you currently have MacOS installed : https://github.com/corpnewt/MountEFI follow this

Or you can download mount efi script

Use tools like Mount EFI script or what you prefer.

You need to mount your EFI partition (find a tool online or use command line). In it you should find "EFI/OC/config.plist". Open the file with Propertree or another plist editor and make the changes.

Open the config in ProperTree (https://github.com/corpnewt/ProperTree) and do a clean snapshot (CMD-SHIFT-R). This will put all of the kexts in the right order.

Open your config.plist using ProperTree.

NO. Prebuilts are a bad way to start. They are not updated and aren't configured to your specific needs. Make your own EFI and also don't use OCAT, use ProperTree which can do OC specific things like OC (clean) snapshots.

ProperTree

Try looking into a program called ProperTree. Has a GUI implementation to easily edit https://github.com/corpnewt/ProperTree

Used the Ryzen and Threadripper(17h and 19h) OpenCore Install Guide for with OpenCore v0.8.7 in combination with OpenCore Auxillary Tools, Sanity Checker & ProperTree.

Use propertree. It is hands down, the best IMO. https://github.com/corpnewt/ProperTree

You need to mount your EFI partition (find a tool online or use command line). In it you should find "EFI/OC/config.plist". Open the file with Propertree or another plist editor and make the changes.

If anything, keep .contentFlavour files removed and try updating your config.plist using ProperTree or some other plist editor which just makes it easier to read. Sorry I couldn't be of much help but its the best I've got right now haha.