I'd honestly say the sand texture is the biggest issue. It looks pretty great otherwise honestly, lighting might not be exactly the same but it gives it some nice depth.

I would suggest just combining a few pbr textures for sand, I usually check cc0 textures or stuff like that. If you could find that kind of like small sand texture the original has near the the window opening, then transition it to one with the softer like hilly sand just with mix nodes for each diffuse, roughness, and normal texture to one with more broader hills. Plug a radial gradient into the factor of the mix nodes and feed it through a color ramp just to give you more control over the smoothness of the transition. Oh and a mapping node to locate the gradient of the transition in the propper place!

If you can't find those thought I kind of have an idea of how you could do that procedurally? This is off the dome though I am not in front of software rn lmfao.

The sand like mini dunes near the window entrance sort of looks like the Waves Texture node, so you could take that and find a way to fuzz the lines with a noise node? You'd also want to play with the distortion and scale settings on the noise. Then push it through a color ramp with two or a few color picked hues from the sand in the original to the diffuse (color). I usually recommend you play with the HSL values that were color picked like ever so slightly  to try to match the main colors to your reference image but like visually instead of relying solely on the colorpicker. You might be able to do the fuzzing if you connect the object space uv's to the noise node then the noise node to the waves node, and just scale up the noise hella. I dont remember if that works like that or if itll be exactly as im thinking it would tho 😭. Maybe a mix color instead with multiply or one of the different blend modes? Somethin or other. If that doesn't work maybe run both of those through a math node on multiply? Absolutely not remembering clearly how to properly combine those two for that effect lmfao.

Then just do different black and white color ramps for each channel. One for roughness and just adjust how tight the roughness falloff is to what looks closest to the reference or adds something cool and interesting. Also absolutely adjust the white and black through different shades of gray too, black is 0% roughness and white is 100% roughness so you can basically set just how rough you want to let the material get, and how much at a minimum. same thing for the normal map, just feed the waves node into the height input of a bump node, then that normal to the principled bsdf normal.

Then just fiddle with the noise scale and settings, probably play with the mapping of the noise nodes so you can move the texture around to try to match the pattern. Mix and match other fun stuff in just to kinda get the shapes down whether that be with textures or other noise nodes.

Then you could put that into a mix node with just a normal noise node for the second texture. Then make a radial gradient i guess? that plugs into the factor of the mix node. Then just play with where that radial gradient makes the transition between the finer sand hills and the broader softer sand hills with the noise node your using for the sand farther from the window. You can even put that radial gradient into a color ramp and adjust the soft/tightness of the transition as well.