Make a soft GM move
Once the situation is well-established, and you feel like it's time to nudge things along, make a soft GM move.
- Present a challenge you listed when they Charted a Course
- Present an encounter from your prep, or from the setting guide
- Have an NPC or follower get into or start some trouble
- Stir up conflict between the PCs
- Offer them an opportunity to do something as they travel, or else to arrive at the next point of interest.
Your exploration moves will be particularly useful here.
You might stay in loose play and make your move while still zoomed out. "Dark clouds start to loom and you can tell that a storm's brewing. Do you want to press on or seek shelter?"
Or you might zoom in, frame a little scene and make your move there. "A few hours later, your hound starts barking for you to follow him. When you catch up, he's in a clearing with a torn-up carcass, crows pecking at it. A wisent, probably, and pretty fresh. What do you do?"