I’m not sure a button makes sense. You’d still need to let the user configure how far it should be looking ahead (they may want to skip a 20 minute step but not a 3 hour one for example). And the user won’t know how many cards are within that look-ahead limit until they press the button. Failing a card and not seeing the red count increase is confusing.
The default learn ahead limit is set to 20 minutes, so that the default learning steps fall within the limit. To do otherwise would mean an out-of-box experience where the user studies a few cards, and is then told they need to wait up to 10 minutes before proceeding. Back when that’s how Anki behaved, it was a frequent pain point.
The answer buttons also show values like <10m, to indicate that the full delay may not elapse.