Try uploading your asset packs as .zip files instead of .png files :)
With your being an admin, I'm sure that should work and I will try that.
But really, why is that a thing? Why in the world should file type matter, and does the upload-module mention this at all? Because if this is why my stuff doesn't pop up, the uploader should tell the user to submit a zip to increase visibility. Also, does this apply to .exes, .pdfs, or any other file extension? I seem to remember being able to search up a few of those that weren't in .zip format.
One of the chief reasons I'm concerned isn't even for just my own visibility, but people like me who probably have assets uploaded incorrectly or otherwise and can't be found in search either.