I've successfully added the JIRA integration into our MS Teams site.
That said, I'd like to be able to configure a JIRA dashboard and select it to display in MS Teams, instead of individual JIRA projects, or filters.
Is there a way to do that, and if so, is there any documentation on that?
Welcome to Atlassian Community!
Per your description, I believe you are using a third-party app like Microsoft Teams Jira Connector or Microsoft Teams for Jira to connect both JIRA and MS teams. Is it correct? Or are you connecting JIRA directly using WebHooks or REST APIs?
Per my investigation, I'm afraid that none of the plugins provided in the Atlassian Marketplace allow you to display JIRA Dashboards directly in MS Teams application.
That being said, the only option I found that can achieve something similar to what you are needing is the app Better PDF Exporter for Jira (PDF View).
Using this app, you can export Jira dashboards to PDF and easily import it on MS Teams.
Although this workaround will not update the data in real-time for the MS Teams, you can optionally create a script to trigger the export and upload the PDF file to MS teams from time to time.
Let me know if this information helps.