Jürgen Klopp and Liverpool were both emphatic about Mohamed Salah's future during the summer. The Egyptian, like most elite players in European football, was (and still is) on the radar of Saudi Arabian clubs, but Liverpool made its stance clear and stuck to it.
In Salah's case that offer would have had to have been a world record fee, and significantly bigger than any fee Liverpool had received in the club's history. That never came and Liverpool kept its best player.
Jarrod Bowen could be an option for Liverpool to replace Mohamed Salah.
Replacing Salah would virtually be impossible, but Bowen would be a strong candidate to fill the right-wing position.