In Teamfight Tactics, why you cannot surrender in Teamfight Tactics s8.5, you can refer to the following:
Because there is a bug in the Teamfight Tactics client where players cannot surrender when pressing ESC in the 3-2 stage, the official explained this bug in the 13.6 version update, but it has not been resolved yet. Players can now only initiate surrender by typing /FF in the dialog box after stage 3-2.
