A:Answer Hi,
If you switch to liner mode it’ll remove the fisheye look. Tap your screen, select settings and change FOV to linear.
Although, you won’t be able to use the 4K video in liner mode... only 2.7k.
https://gopro.com/help/articles/block/video-resolutions-for-hero7-cameras
Liner vs original shot comparison:
https://gopro.com/help/articles/Question_Answer/What-is-Linear-Field-Of-View-FOV
Cheers