...
Start a new Teams chat
Depending on how the appearance is configured and if you are using the new or old issue view, you can start this action a bit differently. We’ll assume you are using the default settings with the new Jira issue view, please see the end of the article to see how it looks like for other settings.
...
After you have typed your message, click “Send to Teams”. The new chat should appear in Jira and Microsoft Teams. You can also choose if the new chat should be visible to user Jira users (read-only) or if only chat members should be able to see the chat content. Read more about this here.
...
Different view settings
Default appearance (issue content) in new issue view
...