You can actually do this extremely easily using a custom ScriptRunner web item! I'll like you to the documentation here.
In the configuration for the web item, you can specify specific sections of JIRA to place the item, including Tempo's:
I’m a designer on the Jira team. For a long time, I’ve fielded questions from other designers about how they should be using Jira Software with their design team. I’ve also heard feedback from other ...
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