Attwell has been in the spotlight for his role as VAR in denying Nottingham Forest three penalties in Sunday’s 2-0 defeat at Everton.
In January the 44-year-old announced he would be stepping down this summer.
The Reds are three points behind leaders Arsenal.
Bruno Fernandes’ double inspired the end of the hosts’ four-match winless run in the Premier League to move them up to sixth.
A second-half double for Mateta helped Crystal Palace derail Newcastle’s top-six charge.
Attwell was already in the spotlight for his role as VAR in denying Nottingham Forest three penalties in Sunday’s 2-0 defeat at Everton.
Manchester City are reportedly also opposed to the proposals.
An investigation by the Insolvency Service into Mr Barnes’ conduct as a director began in September 2023.
Former West Ham, Manchester United and Manchester City forward Tevez now manages Independiente in Argentina.
The club initially asked for the audio to be put in the public domain.