Midi guitar 2 For iPad

Hello All
I downloaded a couple of VST instruments for paid MIDI guitar running on the iPad Pro. For some reason, the “Scan for plugin” function does not see VST instruments. Any idea why?
Thanks
Loris

Apple iOS/iPadOS do not use VST plugins. The instruments would need to be in AUv3 format to be discoverable.

Thank you will try that.