Rather than choosing Mbappe, of course Liverpool will still choose Mo Salah because he has become a symbol of Liverpool and has proven to make a big contribution. Liverpool will not carelessly take advantage of Mbappe trend and ignore what Mo Salah has provided so far. If on the other hand it turns out that Liverpool are really interested, then Mo Salah could feel disappointed with the news. After all Mbappe and PSG have now re-entered into a new agreement in which it is likely that Mbappe will finish the ongoing competition. PSG still needs Mbappe services in the UCL because in round 16 it is still not enough for PSG to feel safe.
Dreaming of Mbappe competing in the Premier League is the dream of many people, there is Haaland who is his competitor. But will that happen this season? While rumors of Mbappe close relationship with Madrid are still quite hot, the behind the scenes deal hasn't already happened. Madrid postponed the purchase in the January transfer window and are waiting for Mbappe next summer.
Liverpool seems good with Salah still in the team and I don't think he's ready to go to a different team yet, if he eventually does, then I'm certain that they'd have a different style of performance subsequently. Also, if Mbappe's added to their squad, then one is certain that they'd have the perfect blend of attacking midfield and forward required. There's high chance that both players will resonate well to yield good and better results for the team.