Metrics related to the mobile app can be found here:
Among these metrics, several are related to the crash of the mobile app. To report the occurrence of a crash for a given version of the mobile app, I would use: builtin:apps.other.crashCount.osAndVersion
Then create a Metric Event and assign it to the appropriate Alerting Profile. Then you configure the integration to send alerts. You have ready for JIRA or ServiceNow, for example, and if you want to send the information somewhere else then you can use Custom Integration (based on Webhook).
Hope this help.
You can set a global or individual (at mobile app level) crash rate problem detection.
Here is an example individual level:
Then as @radek_jasinski mentioned you can create an alerting profile and problem notifiaction for the mobile app.
I recommend for you to create a MZ for the mobile app based on this post with auto tags:
Here is a problem notification:
I hope it helps.