You have to use a lightning wallet to pay with Bitcoin. They will show you a lightning invoice right next to the CashApp, Apple/Google Pay options. The minimum amount you can pay for acceleration is 51,000 sats, which seems expensive. If you don’t already have a lightning channel set up, this will cost you additional fees. If it is really urgent, you can decide if it is worth it to jump through a few hoops to use lightning and pay these extra fees.