Salah again struck in their Champions League win against RB Leipzig this week.
Wijnaldum said, "Yes, it is [pretty amazing].
"We hope that he can continue doing that because that will make it easier for us to win games.
"[It's] amazing what he is doing. He is always searching for a goal, always searching to come into positions to score a goal.
"Yeah, 25 is a good number – hopefully he can continue scoring goals."
He added: "This season, unfortunately, we're in a position and a situation where we don't score every chance we have. It [creating chances] gives you a really good feeling; sometimes also you're disappointed because you don't score the chances you get. But that we create chances again is a good thing."