Anyone having a problem importing media into iMovie

You didn't mention any details as to the solutions that your online answers offered. However, sometimes with upgrades iMovie preferences can go awry. In that case often deleteing/resetting preferences will cure the problem.

To delete/reset preferences, open iMovie while holding down the Option and Command keys and select to delete preferences in the box that appears. iMovie will open in a new library. Reopen your old library to get back to your projects. Possibly you may need to reboot to set the changes.  Deleting preferences is a safe procedure that will not cause data loss or disruption to your project.

You could also try creating a new project and seeing if you can drag video's or photos into its timeline.

-- Rich

I'm having issues importing video to imovie from my iphone 13 Pro. Video is fine on phone and on computer but when viewed on iMovie it shows up as extreme white like the white balance is off almost like your video was in direct sunlight except it's the same inside. Picture on top is a screenshot of a photo in imovie and the one on bottom was a screenshot of the video in iMovie. Same project same board. I bought the 13 Pro specifically for youtube videos and haven't been able to use it. Is there a setting on iMovie or is my FPS too high on my phone?

Sometimes videos recorded with HDR enabled can result in bleached out clips in iMovie. You can turn off HDR from your iPhone settings.

Adjust HDR camera settings on iPhone - Apple Support

— Rich

Also I meant to mention I am running on macOS Catalina Version 10.15.7. Wasn't sure if upgrading to Monterey 12.6 would fix this or not?