Delta Chat should support group voice calls within group chats. There should be a call icon at the top of group chats, similar to 1-on-1 chats. When a user starts a call, it should notify other group members dynamically so they can join the ongoing call easily with a single tap from inside the chat interface.
Currently, there is no option or button to initiate a group voice call directly within group chats. The only workaround is for a user to manually create a link externally, copy it, and paste it as a text message into the group. This lacks a native user experience, does not provide an active call status indicator, and is less accessible for users.