Push notification in element ios app with sygnal push notification gateway

I am using modified element ios app and sygnal push notification gateway.
When I make a call with ios device, push notification comes up like message notification.
How can I fix this issue?

Start by reproducing the call notification behavior in the modified Element iOS app with the Sygnal push notification gateway, then trace how incoming call pushes are handled versus message pushes. Done means call notifications are presented using the intended call-specific behavior rather than as message notifications.

Written by the indexing model from the issue text.