Changing system product name can be tricky so I signed out of iCloud, booted a cloned copy of Ventura, changed both System Product Name (iMac20,2 in this case) and serial numbers, and signed into iCloud on the clone.
Sidecar requires all devices to be signed into the same iCloud account.
With
FeatureUnlock.kext applied and these terminal commands issued...
Bash:
defaults write com.apple.AppleGVA gvaForceAMDKE -boolean yes
defaults write com.apple.sidecar.display LowLatency -bool True
defaults write com.apple.sidecar.display MinBitrate -int 250000000
defaults write com.apple.sidecar.display MaxBitrate -int 250000000
... we got this, which is a screenshot of the
iPad mini 6:
The connection can be finicky to establish. It may look like this on occasion, but otherwise it works. As noted by
@alyxferrari, we need to tweak the two Bitrate values