first half rules?

Trying to figure out how first half bets are actually settled, especially in live betting. So if you’ve got a wager on the first half moneyline or spread, what happens when the game gets suspended before halftime? Is it just a straight refund every time, or does it depend on the sportsbook’s own rules? It seems like some count the bet if a certain amount of time’s played, but I can’t find anything consistent.

Also, do most places offer first half options for all sports, or just the main ones like football and basketball? Been sticking to soccer and noticed some books don’t even bother with halves unless it’s a big league. Curious what everyone’s experience has been.