Disconnect between prompt and results

Welcome to the community!

I do not have a complete answer, but some tips...

The most important parts of the prompt should be close to the beginning. So, sometimes you need to rearrange the prompt to get better results. Also recommend removing unneeded words. You do not need to write in a conversational form.

Firefly basically cannot count. So, asking for "four" or "five" of something rarely gets you the exact number you are looking for.  You can try to alter the prompt to "encourage" more of something.  By rearranging, I was able to get three (shown below).  If you are "missing" something, you can try to add more in firefly gen fil or photoshop gen fil, but that can be easy or hard based on what the object is. I was not successful adding more dormers with firefly gen fil.  With sufficient photoshop skills, you could add more using the ones already there. That could take some effort depending on your skill level.

In my test, I used your image above as a reference image. I rearranged the order. I added the word "long" because I thought it might not have sufficient space to add dormers based on the length of the roof. I changed "four" to "multiple".

I used this prompt:

long fancy mansion roof made of brown clay tile with multiple prominent copper dormers just below the roofline. two copper finials on at either end of the roof. A cupola in the middle of the roof. partly sunny day. building is painted in white stucco. forest in the background.

https://firefly.adobe.com/public/t2i?id=urn%3Aaaid%3Asc%3AUS%3A2153d47e-1476-4772-9f2e-c56883816157&ff_channel=shared_link&ff_source=Text2Image

Others might have additional suggestions.  Good luck.

UPDATE:

I was able to get four with a slight prompt change and several iterations:

very long fancy mansion roof made of brown clay tile with lots of prominent copper dormers just below the roofline. two copper finials on at either end of the roof. A cupola in the middle of the roof. partly sunny day. building is painted in white stucco. forest in the background.

https://firefly.adobe.com/public/t2i?id=urn%3Aaaid%3Asc%3AUS%3A05569459-d536-42d7-b8fe-9a62fbb134e0&ff_channel=shared_link&ff_source=Text2Image