Hi @NB094, welcome to the community! 
When deploying to Streamlit Cloud, your .streamlit/config.toml should be in the root of your repo:
Once you move it to the root of the Github repo, your deployed app will detect your custom theme!
This also means that you will have to move Easy-GANs/NumberGenerator at main 路 NB094/Easy-GANs 路 GitHub and Easy-GANs/Pix2Pix at main 路 NB094/Easy-GANs 路 GitHub to their own repos if you want them to have other custom themes. If those apps use the same theme as SRGAN, a single config.toml file at the root of the repo should be sufficient.
Happy Streamlit鈥檌ng! 
Snehan

