Welcome to the forum! Sometimes it takes them a while to settle into a new home. Some of them like a separate feeding tub and others prefer to be fed right in their main tank. It may take a few days for him to gain an appetite so keep trying. Be sure to offer just a few bugs at a time and repeat for about 10 min or until he loses interest. Remove any leftover bugs from the tank after meal time. Offer 2-3 meals per day depending on how hungry he seems. For now I'd just let him relax in his new home and adjust.
If you provide details about your setup and lighting I'll be glad to go through it to make sure everything is just right for your new buddy.
If you want to upload photos, you can upload them here
https://www.beardeddragon.org/useruploads/ and post them using the XIMG button.