At 9, there's Kane if can be signed quickly. Even if you'd sign him on a lot of money, the guy could push you to a CL win on short notice. If you can fund it, it would pay off. Not in a big way, because you'd get what you pay for and he's older, but in a reliable way.
Other than Kane the market is piss poor for reliable names with pedigree for a lot of money. Risk is too high. It's a myth anyway that you need a star 9 to win big titles. How many big goals did Firminho score when he was leading the line for Liverpool under Klopp, don't remember many big goals by him in clutch games.
We aren't completely naked at 9 either if we don't find a suitable candidate. Even if he is not a difference maker in big games, Torres is not a bad player at all.
It is true that a non elite 9 is gonna put more pressure on wingers, just like having Firminho, who was not a big scorer, pushed Salah and Mane to deliver the goods constantly. And Raphinha and especially Yamal will be under a lot of pressure to score many goals. Yamal's scoring record is especially poor when compared to players like Salah.