Eufa rules state
If a team has 10 or more cases of COVID-19 inside their squad, then they will be obliged to play if they have 13 or more players (including one goalkeeper) available from their submitted A list. If they have less than 13 available, they will be able to field players who were not initially included in a club’s submitted squad for either the Europa League or Champions’ League. If they cannot get together a 13 man squad, then they will forfeit the match and lose 3-0.If a team has 10 or more cases of COVID-19 inside their squad, then they will be obliged to play if they have 13 or more players (including one goalkeeper) available from their submitted A list. If they have less than 13 available, they will be able to field players who were not initially included in a club’s submitted squad for either the Europa League or Champions’ League. If they cannot get together a 13 man squad, then they will forfeit the match and lose 3-0.
I doubt EFL have such rules though, or have even considered them.