Hi All,
I have gone through many blog posts which explains developing SAPUI5 Application but lacking details about how to deploy the application to SAP Cloud Platform (SCP).
I struggled and learned it after lots of reading.
I would like to detail out on deploying SAPUI5 application from SAP Business Application Studio.
First thing, we have to make sure the application to test the application from SAP Business Application Studio.
To test your application, you need to make "run configuration", switch to "Run Configuration"
Click on "Add Button" to add a new configuration
Once "Add Button" is clicked, the command pallet should bring the list of all available applications
Select the application for which you would like to test
It will create a new run configuration as shown below

Run Configuration
Next is to click on the "Run" button, this should launch a debug console and expose some ports
There might two different ports exposed, one for the listener and for the app
Make sure you click on Open tab on "Expose and Open"

This should launch a new tab which will run the application
Please note the URL of the test application, it should look like:
https://<cloud-test-url>/<name space><module name>/index.html
https://<>/comtestprashilHTML5Module/index.html
If all works fine and you are ready for deployment on SCP, first connect to your SCP account, subaccount, and space.

Login to CF command pallet
There is also an alternative to login to Cloud Found using the terminal: Open the terminal and type
cf login
Once logged in and Org and Space are set, let's build and deploy.
The SCP requires a Multi-Target Application Archive (*.mtar), this will be generated as an artifact of the build process and can be selected to deploy. You have to open the terminal and navigate to your project. Once there, you can run the command:
mbt build -p=cf

If the build is successful, you'll see the path of the .mtar file which is ready for deployment.

In the deployment logs, look for application host
Application xxxxxx-approuter" started and available at "xxxxxxxx-approuter.cfapps.sap.hana.ondemand.com"
Now, you can launch your application using the url as:
xxxxxxx-approuter.cfapps.sap.hana.ondemand.com/<name space><module name>/index.html
I would like to highlight that you have to modify the URL with the name space and module name to launch the index file.
Thanks
Prashil Wasnik