Direct answer
Check your local regulator’s authorised list for online in-play betting and the exact sportsbook’s NFL menu. In Australia, online in-play sports betting is prohibited. An ordinary bank-card deposit does not change what an app may accept after kickoff.
What to check
A live score, cash-out quote and live wager are three different features. Check whether new tickets can actually be accepted locally and whether the market is for the rest of the game, the next drive or a named period.