jim8flog
Journeyman Pro
I don't believe 'ready golf' necessarily applies to Matchplay!
Whilst not 'necessarily', under the 2019 Rules opponents can agree to play out of turn in match play.
For clarity
Match Play
Exception – Playing Out of Turn by Agreement to Save Time: To save time:
• The player may invite the opponent to play out of turn or may agree to the opponent’s request to play out of turn.
• If the opponent then makes the stroke out of turn, the player has given up the right to cancel the stroke.