Hello, and welcome to OSM!  I wanted to drop a note.  The correct tag for letters on a mountain is:

man_made=geoglyph

You can read more here:
https://wiki.openstreetmap.org/wiki/Tag:man_made%3Dgeoglyph

Additionally, it shouldn't be name=T, but instead, it should be inscription=T.  The art is the letter T, which is an inscription, not the actual name.