That would be nice if possible. Since Bitcoin-Betting is an exchange, when you place a bet, you are accepting an offer. This means that only single bets can be made.
I still don't understand why you people keep calling it an exchange when you cannot even lay bets. It's just a decentralised sportsbook with players deciding the odds plain and simple.
It's similar to sites like Polymarket where you cannot parlay bets either and is totally different from proper exchanges like Betfair etc.