Bottom plastic guide for the closet doors was
Removed so they could lay the ceramic tile.
If it is covered over. You would have to use a ceramic drill
To reapply the plastic guide over the tile. Or should he notched
Cut around the guide

I think he did it correctly, Hate seeing them Notched, You will have a cleaner finished look. Maybe use plastic anchors, and Stainless screws. A Tapcon would likely Crack the tile, Good luck