The ready button works with all kind of raid passes
The ready button works in both public and private lobby
The ready button will only be enabled when there is 2 or more players in lobby so no instant solo
The ready button disappears when there is 15s left
When all players are ready the countdown will move to 10s instantly
Once the lobby hit 20 players the countdown will move to 10s instantly. However players are still given a chance to leave without consuming a raid pass