I have been where sing Libre 1 and Miaomiao 2 for over a year
Yesterday, I started my last Libre 1 sensor and, in 2 weeks I will start Libre 2.
My plan is to patch the LibreLink app and ditch the Miaomiao as it should no longer be required.
Obviously, I have no experience of this yet but, in your shoes, I would investigate this option before forking out for the Miaomiao.
Regarding my Miaomiao 2, it has been really useful. But the battery life is not very long. It has never been the advertised 14 days and is now down to 3. If needed to start again, I would buy the larger version 1.