@Nidhi Priya, Thanks for posting in Q&A.
From your description, I know you want to deploy com.cisco.webexcalling app package under Managed Google Play store app but did not find it.
Based on my research, when I search com.cisco.webexcalling in Google play store, it just shows apps below and there is not webexcalling in google play store, maybe the app just integrate with other apps or removed by google play store.
You can contact Cisco support to get new app package name or refer the link below to deploy webex app via Intune.
Non-official, just for reference
Hope above information can be helpful.
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