Push notification is not receving

Yes, the project is working fine, We are in the process of checking by generate .apk file for android device

How to show notification popup for push notification in mobile?

the question is not related to Backendless,
you may ask the question on Ionic forum

In below url backendless given options

https://backendless.com/docs/js/push_android_push_options.html

The options listed in the documentation you referenced apply ONLY if you use Backendless push templates AND Backendless SDK for Android

Regards,
Mark

means In Backendles JS SDK, can’t we use push templates?

Push Templates work only with native Backendless SDK for Android and iOS.