Custom Theme is not reflecting after App's Deployment. (Its working fine locally)

Tried re-booting/ re-deploying the app several times. Nothing worked for me.
Followed the official steps for creating a config.toml inside .streamlit folder still it doesn’t work for me.

I wasn’t able to upload the .streamlit folder directly to the repo, “This file is hidden” was popping up. I had to manually create a folder and add the config.toml inside it.

There’ no option for custom theme after deployment even.

Help or Suggestions are appreciated. Thankyou

Screenshots :