I use a Dexcom G7 which feeds the Dexcom Clarity App. I self fund this CGM, but after taking a paper print out to an endocrinology appointment a few years ago, they were happy to get a Clarity sharing link from me.
That said, at my appointments when viewing the linked data, discussion has tended to focus on patterns and time in range for the previous 2 weeks of data only. But easy to continue sharing. Plus I was given a pump at the beginning of this year and it is comforting to know that I can always ask the diabetics pump team to review this data if I'm running into problems.
Agreed it is rare to share CGM data with a GP practice, but I have found my local staff very interested when I go to them for annual footchecks. My current practice had a number of staff trialing Libre 2s and Dexcom Ones when they were gearing up to issue these.