Priority icon was released and is now visible if you configure it on the card layout. First from the Project settings ---> Issue types you need to add the field to the respective issue type as shown below.
Once you add the field here you should be able to see the icon on the backlog as shown below.
Hi! My name is Eoin and I'm a product manager working on Team-managed projects in Jira Software Cloud. We're continuously improving and updating Jira Software and feedback from our customers is ...
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