Can anyone verify my NN diagram if it is properly drawn? I am working on a Neural Network that can estimate building's carbon footprint based on the set of features and an image of urban surroundings (via CNN).

I have used Netron to visualize the network (up) but this image is not readable in a publication so I drawn one myself (down).

Can anyone comment if this is proper representation - especially the last part after the concatenation - I am not sure if there should be 2 or 3 dense layers?
I do not think there is a special kind of format that needs to be followed as long as the image is clear and readable, which (imho) it is for your case. Regarding the last 2/3 layers, the final layer is the output with 1 unit, so you pictured it correctly, along as the article mentions the output shape (that is not a multi-output situation).
Good luck with publication!