He's not even on the radar right now for Liverpool and if you look at his potential and form from last season it's clear that Nunez has the upper hand at the moment especially he's still very young and still has big opportunities.
Liverpool may have several lists of players on the radar of the transfer market this year, but Nunez seems to be the main choice because Liverpool offer a high contract and bonuses for the next five years, the value of the contract offered can cause jealousy for Liverpool main players because salaries can compete with Salah. So even though Nunez rating has increased but I don't think Liverpool need to offer a contract that is too high because I believe Nunez will be proud to be joining the Reds.
According to reports and news that I read, it was Nunez who want a high salary up to no less than the value he asked for, Liverpool even just want to focus on transfer fees and extras. Nunez is indeed being targeted by another club Manchester United, But plus point Liverpool has already pocketed a ticket to the champions league next season, so Nunez will be willing to accept Liverpool offer even if the salary received is smaller than Salah because this a special event always be hunted any player.