Hard to tell, but in order to have him thrive, you'll need to check out the stickies at the top of the Sulcata section and make sure you have his habitat set up properly. One thing I see that might be a problem is you have used too much calcium powder. They don't like the taste of it and when you use too much they won't eat. Just a pinch between your index finger and thumb is all you need.
https://tortoiseforum.org/forums/sulcata-tortoises.88/What stickies?