Question – if you were to take this asset into Unity, can you reuse the shader somehow, or do you need to recreate it? What about when uploading to Sketchfab?
You certainly can export this treasure chest and its textures (maybe materials too?) to work with Unity, Sketfab, etc. As Tomas points out there’s a little conversion work that needs to be done, relative to every situation, but it’s very possible. Check out this course/lesson from @jlampel to get an idea of the process.