It's too nuanced and would be taken out of context given a binary answer.
Put simply, I think Frank is experiencing the exact same issues every other big club has had with Muani, Simons, and Tel.
He's doing better (for output) than any manager has ever done with Richarlison.
Kudus has more assists per game for Spurs than he's had for any club before in his career.
So it leans towards a 'Yes', if we are basing on statistics and evidence, instead of pure unsubstantiated opinion.
It's like me asking for a simple yes/no for "You think Frank would be doing no better if Maddison, Kulusevski, and Solanke had been fully fit all season?"