Hi Robert,
I was planning for this SP rename that is in preview and had some limitations in the PowerAutomate flows as they were supposed to be recreated after the SP rename. We didnt proceeded due to lack of export import functions and support as this is under Preview. There were few other points that stopped us renaming the SP listed under high impact.
I will suggest you to read the FAQs if you have not most of the queries are answered there - domain-rename-faq
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