The android apps need to be connected to your main domain i.e yourdomain.com OR app.yourdomain.com
First, you have linked to your main domain:
https://discuss.foodomaa.com/d/3326-adding-your-custom-domain-to-the-new-platfom

Procedure

1. Create a ticket on https://support.foodomaa.com and request the Android Apps

2. If your main domain is already linked, we will send you the requirements list/form to be filled.
   (Logo, AppName, Version, PackageName, Firebase Account etc)

3. After the required documents are received by us, we will start building apps for you, and will be delivered in 24-48 working hours (Depending on the apps waiting queue)

NOTE: You will not need to configure anything on the Firebase or Foodomaa for your Android apps, you just need to provide us the Full Access to your Firebase account and we will generate all the required things for your account and we will configure them for you.