I am afraid that its not possible. You might have to contact third party vendors and more over Flow is a corporate licensed tool (Microsoft) for syncing items from JIRA to sharepoint.
There used to be a plugin Sharepoint Connector for JIRA which has been archived.
If you spend enough time as a Jira admin - whether you are managing a single, mid-sized instance, a large enterprise one or juggling multiple instances at once - you will eventually find yourself in ...
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