Bet builder allows you to create a combo bet on maps within the same match. For example, you could bet on the Map 1 winner and a Map 2 total round market within the same match:
This is treated like a combo bet. If all of your chosen selections win, you'll win the bet. If at least one of your chosen selections loses, you'll lose the bet.
If this feature is available on a match, you will see a 'Bet Builder' button at the top of the match page:
XP
You will receive 25xp per 1 coin bet on a Bet Builder.
Limits
This is only available on select Counter-Strike, Dota, League of Legends, Valorant, Basketball, Cricket and Football matches for now. This feature cannot be added on request if it's not available on a listed match.
Bet Builder is only available pre-match. It will not be available once a match is live.