Official fSpy importer for Blender
If you're talking about the fSpy-Blender addon from GitHub, then v1.0.3 works on Blender v3: https://github.com/stuffmatic/fSpy-Blender/releases
NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.
Projection Mapping part 2 Modeling
1 project | reddit.com/r/blender | 29 May 2022
1 project | reddit.com/r/BlenderSecrets | 28 May 2022
Does anyone know of good guides/documentation for modeling vehicles from perspective images?
1 project | reddit.com/r/blenderhelp | 21 May 2022
How can I get the exact focal length of a reference image?
2 projects | reddit.com/r/blenderhelp | 17 Mar 2022
3D Design _Blender Focus - Free Use Photo,Video,Texture,Models and other general tools
1 project | reddit.com/r/artrefdump | 12 Feb 2022