Hello! my first beardie died because of unknown reasons 2 days ago but now I have a new one! Say hi to-...... I don't have a name for it yet but it'll have one soon!
I think the lighting will need an upgrade. During the day you'll want a bright white light that produces heat. I like using PAR38 halogen flood lights. That should sit in a dome fixture like this https://www.theisens.com/products/brooder-lamp-18/2-sjeo-x-6/40820211/
You want to adjust the height so that the surface temperature either along the bottom of that log or the top of the platform he is on gets to around 100-105. The surface temp on the left side of the tank should be around 75-80 or so with a nice gradient between. That will cover the heat portion.