wel.. um.. i dunno if this helps mayb answering the question wrong but ill try my best

when tapping on the higher notes ur right hand should hit the fretboard closer to the fret bar of the note b4 lik if ur right hand taps 22 hav ur finger hit between 21 and 22 and but close to the 21 fret bar cuz the fingerboard between those frets are thin and also try to pull down to make it a lil louder not lik bending just quickly strikeing it