I see Rodrygo as a Premier League player, i mean he is fast and have very good finishing from a long time the Premier League is focus on this type of strikers and not into the clasic number 9, only Chelsea with Delap in this recent market own a clasic 9 in the top teams.
Rodrygo can be something like Gabriel Jesus i believe, maybe a little bit worst.
Seriously, do you forget if Rodrygo's actual position is a winger. Although he can play as a striker, but it's not his best position. The better for Arsenal to sign a natural striker rather than another versatile like Rodrygo. They're also in progress to sign Gyokeres from Sporting too. Just wait and see.