That u cant move is not problem, because theres a neat trick to go in such places.
First do it like 0Muttley0 Did and Misty step, even use it as often as u like by Arcane recover. If done theres one more building bridges on your own to climb your way forward.
Imagine it like STEPSTONES to make your way forward.
1. Simply PICK UP some crates with another Companion and send them over to GALE whos allready on the other side.
2. Put at least 2 CRATES not BARRELS on ground from Gales inventory.
3. Allways put CRATES into direction you want to go.
4 Climb on crates to get into chosen direction.
5 Grab Crate from behind to put it in front of moving direction.
6. Climb again on crate in front.
7. Rinse and repeat as often and far as u like.
HAVE FUN EXPLORING NEW AREAS
UPDATE /correction 26.10.2020: Thanks goes to
orbax how to get over Bridge by Stacking Boxes for height and then Misty Step. And another thanks goest to
0Muttley0 for casting Lesser Restoration on me in this Forum, because it seems i was somehow blinded

PS: I could use the Camera outside of map when i "Stepstone" walked my way to the and of map in the Mountain Pass and reached the end of Road. I could see a totally new Bridge made of wood and more far away. Some animated light effects in yellow/green in a location far east (see Pic., Cam. was turned around so lights are on far right). That means most of the Areas you cant go to are allready in the game. Only blocked by the Developers Barriers. So you know what to do, glitch yourself out of map to reach all that new stuff
https://i.imgur.com/8obpYzC