Ja,
Abbotts Libre3 app sendet alle 5-Minuten-Periodenmessungen aus dem Speicher des Sensors an Libreview und der Speicher reicht bis zum Start des Sensors.
Can confirm that this works. After reconnecting to the libre 3 app (as "new" sensor) the data per 5 min is being uploaded to libreview.
There is a bit of a delay (depending on how many days). But it is updated.
Also while you are using the direct connection with the watch, you can still use the libre 3 app to register glucose intake and insuline dosage.
These will still be uploaded to libreview as well.