All bets will be settled at the end of regulation time unless extra time (or overtime) is stated in the market description.
This means that for most bet types, any events that occur in extra time will not count towards the bet.
Where the market explicitly states 'incl. Overtime, or any similar variation, the bet will be resulted based on the outcome at the end of extra time, not regulation time.
In a Win-Draw-Win market, if you place a bet on any of the outcomes (win or draw) they will result at the end of regulation time, regardless of whether the match goes to extra time or not.
In a Total market, a bet placed on either of the outcomes (over or under the score), will be resulted at the end of regulation time, regardless of whether the match goes to extra time or not.
If the description of the market states that it 'incl. Over time, then the outcome (over or under the score) will result at the end of extra time.
For more information regarding specific games/markets please see the Betting Rules Help Article.