Welcome to the forum! Please give these a read-
How To Raise A Healthy Sulcata Or Leopard, Version 2.0 https://tortoiseforum.org/index.php...ealthy-Sulcata-Or-Leopard,-Version-2.0.79895/
For Those Who Have a Young Sulcata... https://tortoiseforum.org/index.php?threads/For-Those-Who-Have-a-Young-Sulcata....76744/
Beginner Mistakes https://tortoiseforum.org/index.php?threads/Beginner-Mistakes.45180/
Could we see a picture of the whole enclosure?
Please be sure that your substrate is damp, and that your humidity is 80% or higher
Everything looks pretty good to me! Just make sure you aren’t leaving him outside for more than 30 minutes to an hour at his size. The general rule of thumb is “one hour per inch of shell”