You have a few options. If after consulting the resources below, you are still unsure whether a trail you’d like to ride is open to a Class 1 eMTB like the Shuttle, try to contact the land manager in question.
Get the Free Trailforks App
Trailforks is your guide to more than 160,000 trails around the world. This free app includes a search function highlighting eMTB-legal trails. On the map settings panel, where you see land ownership, swipe the panel to the left to reveal more options. You’ll find the eMTB filter there. Get Trailforks at: https://www.trailforks.com/