Liverpool have Gomez, Van Dijk and Matip competing for 2 positions. As for Salah they’ve added Jota. TAA has Neco Williams as cover. Liverpool bought a Greek international left back. The replacements won’t be are at the same level but they do offer decent cover.
We have Mendy, who mostly due to injury, has failed to live up to expectations, and no other specialist. Zinchenko, Ake and Cancelo are all options but none are natural left backs.
The real issue is that our only left back hasn’t been consistently fit enough or performed well enough. The mistakes at Wolves and Chelsea last season were costly and he looked rusty at Wolves, ropey against Leicester, admittedly he wasn’t the only one. He was much better against Burnley but that has to be the norm for him or he will get targeted a lot this season.