open finder > go to the top bar > click on 'go' > click 'go to folder' > paste the path in there ('Library/Application Support/Godot/app_userdata/PNGTuberPlus') and you should be able to find it. it's like a weird internal folder that's harder to find otherwise. hope this helps ^^
go to settings > privacy, scroll down and there will be a banner at the bottom saying "PNGtuber plus was blocked from use because it's not from an identified developer." and then just click the 'open anyways' button.