Hello! Great that you are offered the closed loop. I was actually offered dexcom BECAUSE of moving to the oficial closed loop (I had used AndroidAPS for 4 years), ypsomed with CambridgeAPS loop. I had a strong preference for a tethered pump, as I tried Omnipod and did not like its bulk on me (also, the environmental considerations).
Before FSL was refunded I tried both systems (FSL2 then) and they were comparable for me. However with time - maybe it is just me - but I had more and more issues with FSL and the discrepancy with fingerstick grew.
Closed loop is just brilliant, CambridgeAPS works very well for me. It is better (because more aggressive in design) than APS in flattening (moderate) peaks. One area where it is a bit problematic for me is exercise, an unplanned brisk walk sends me low (whereas both with standard pump and AndroidAPS it was much easier, maybe i will find a way here too...)
At my clinic I was not told about any hypo awareness/other condition. I waited for this change very long though, my pump model was taken out of market (insight Roche) and then my pump warranty expired > year before the ypsomed came but I did not want to change because AndroidAPS +FSL2 were such a game changer for me
I am afraid it is post code/consultant lottery. I would be persistent and ask why not dexcom, why only omnipod etc. and make my preferences known. I know it is not easy, I changed my clinic/consultant because I was systematically gaslighted in my previous one (systematically might be an overstatement for 1 visit per year..). My previous consultant was trying to convince me back in time that FSL (compared to fingerprick) is a waste of money even though I had numbers to prove it is not. Sometimes I wonder what he thinks about it now (or maybe he sees himself as a resource gatekeeper, I would though appreciate more an honest 'we can't fund it' than 'it does not help').