If you want to continue using Clover (which is still a good choice from my point of view - I use OpenCore 0.7.5 or Clover 5142 indefinitely) you will have to update it in its 5142 version (with update day of UEFI drivers - OpenRuntime.efi in particular) and kexts as usual ...
It will also be necessary to modify the config.plist, using Plist Editor for example, by adding a Quirk in the "Quirks" section:
Key: ResizeAppleGpuBars, Type: Number, Value: -1
and,
to install or update Monterey, using Clover configurator (imperatively 5.19.0.0) :
in the SMBIOS section: check Update Firmware Only (to keep the serial numbers, Board Serial Number, SmUUID, etc.)
In the drop-down menu located next to this box, choose your SMBIOS, in this way two new items will be entered: Extended Firmware Features and Extended Firmware Features Mask.
If you use an SMBIOS corresponding to a Mac equipped with the T2 chip, you will also need to enter a new item entitled HWTarget in the Rt Variables section.
The HWTarget corresponding to the SMBIOS “T2” used is found in this table: (do not use parentheses)
MacBookPro 15.1 (J680AP) 15.2 (J132AP) 15.3 (J780AP) & 15.4 (J213AP)
MacBookPro16.1 (J152FAP) 16.3 (J223AP) & 16.4 (J215AP) MacBookPro16.2 (J214KAP)
MacBookAir8,1 (J140KAP) & 8,2 (J140AAP)
MacBookAir9,1 (J230KAP)
Macmini8,1 (J174AP)
iMac20.1 (J185AP) & 20.2 (J185FAP)
iMacPro1,1 (J137AP)
MacPro7,1 (J160AP)
EDIT : I forgot to say that Clover remains the best bootloader for Dual Boot (with Windows and macOs)
Attached is an example of config.plist for iMacPro1,1