@J360 Please place the .mp4 file and the .insv file in the same folder and make sure they are named the same.
Then open with Street Builder the .mp4 file. Street Builder will read the GPS from the .insv file

The .gpx export option in Insta360 Studio is new and GoThru Street Builder does not work with it yet, but it knows to extract from the .insv which is similar.