Before anyone says it’s impossible, I’ve seen inverted suspension chords on theorytabs before, here’s just one theorytab with an inverted suspension chord:
https://www.hooktheory.com/theorytab/view/mus/love-live---a-song-for-you-you-you
And I doubt it’s a hookpad+ feature since this guy managed to invert a suspension chord and he doesn’t have hookpad+:
https://www.hooktheory.com/theorytab/view/pink-floyd/shine-on-you-crazy-diamond