I have a template created in the web dashboard and one device created from that template. All is working ok on the web dashboard since mid 2022. However my mobile devices (Apple nor Android) do not see the template nor the device (I only tried this for the first time today). Creating a new template on the web dashboard works fine and the template is visible on the mobile app. Changing items such as data streams in the template do not force a sync with the mobile app.
This topic has been discussed a couple of times already (2021-2022) with the proposed solution to delete the template and recreate it. That is a possible workaround but a bit unfortunate as that device has been running for almost two years now without issues.
It is clear this is not a blocking issue, but maybe it should be added to the bug list and handled whenever considered relevant.