Yes, they do.
Liverpool have played 30 games this season in all competitions (excluding the League Cup one with the kids).
Only 2 players have appeared in all of them. Robertson (28 starts, 2 sub apps) and Firmino (25 starts, 5 sub apps).
Van Dijk has played in 29 (29 starts, 0 sub apps) Alexander-Arnold has played in 29 (25 starts, 4 sub apps).
Mane has played in 28 (25 starts, 3 sub apps). Salah has played in 27 (27 starts, 0 sub apps). Henderson has played in 27 (24 starts, 3 sub apps)
Outside of Robertson, Alexander-Arnold and Van Dijk, who appear to be at peak physical fitness, the rest of their squad have all had, at the very least, 3 or 4 games off.