I couldn’t restore from my past purchases either however there is a really good fix, download the free Shuggah app from App Store. I found it at midnight when I realised there was a problem, some lovely person posted about it. It s SO much better than the official app as it turns our Libre sensors into a proper CGM, no more scanning! Still getting my head around the alarms that you can actually change, but now have my blood sugars popping up on my calendar (so on all devices) and as a banner when I open my phone, and as a label on the app button. Will be hard to go back to the official app after using this one but will have to at least check in with it every 8 hours for the NHS data I guess!