That looks great
My suggestion would be to move everything up the cage a bit heightwise. eg deeper substrate and the little shelf moved up higher above the deeper substrate. Mainly to cushion any falls from a height. It might seem like an awful lot of substrate to put in but the more there is , the less often you need to do a substrate change - just take the odd handful out and replace it now and then and empty the litter tray instead (if you have one) or if not just spot clean the pee corner/area. She will need a bigger wheel as well - sorry if you already know that
They always put those tiny 5 or 6" wheels in cages and they're only suitable for dwarf hamsters. This Trixie wheel isn't expensive and a good size for a syrian.
https://www.amazon.co.uk/Trixie-Exer...m+trixie+wheel