You won't have access to the full range of Riders Republic's transport options from the get-go. You'll need to unlock them by earning Stars first. Unlocking the Rocket Wingsuit as early as possible is key, as it allows you to travel across the map much faster than any other option. Here's how to unlock the Rocket Wingsuit.
Riders Republic: How to Unlock the Rocket Wingsuit
To unlock the Rocket Wingsuit in Riders Republic you will need to earn 30 Stars. This is fairly simple to do, as you will start on 11 or so once you've beaten the short tutorial section at the start of the game. I recommend heading over to the Tricks Academy and completing the tricks training there. You'll get a Star for each lesson you play, and they're generally extremely short.
Another thing to keep in mind is that all events have secondary objectives, some offering as much as three extra Stars on completion. Check these before heading into events and try to complete at least one as you play. Reaching 30 Stars will unlock the Aerial career, giving you the Rocket Wingsuit.
How to Equip the Rocket Wingsuit
To equip the Rocket Wingsuit while in free-roam, press up on the d-pad. Aerial disciplines are at the top of the wheel. You can cycle through them with R2/RT and L2/LT buttons. Pressing select will equip the Rocket Wingsuit. From there you can either press L1/LB to fly directly upwards, or X/A to shoot straight forward.
That's all you need to know about unlocking the Rocket Wingsuit in Riders Republic. For more help with the game be sure to visit our guide on whether to use Racer or Trickster Controls. Elsewhere there's our look at whether Riders Republic is on Game Pass.