I’m coming out of left field here, but I think that you can get your guardian and 670g pump data to CGM onto your phone via nightscout. I kinda sorta looked into using medtronic 670g with nightscout here: Is there a data analysis app that overlaps dexcom and medtronic data?
In that thread, there’s a link to the nightscout page I was looking at.
But it wasn’t going to work for me because of phone compatibility. Might be worth looking into?