It appears that Medtronic will continue to manufacture and support the Guardian sensors for the foreseeable future. Here is one of the Medtronic executives talking about it. I have timestamped where she is talking about Guardian but the whole episode is pretty good if you are curious where Medtronic is going with its 3 different CGM sensors in 2026. In case the timestamp doesn't work she talks about the Guardian sensor at 21:22.
https://youtu.be/ai-E5Ch7Y1c?t=1282
Hopefully I linked that correctly. I'm pretty new to Piefed. If it was me personally and I had the option I would switch to their newest sensor, the Instinct. It is made by Abott and is essentially a Libre 3+ as far as I can tell. I am currently using the G7 but I used the Libre before that and I really liked it. Very accurate and a long wear time. No complaints really.
EDIT: Inserting an URL didn't work. You may need to copy and paste my link. Sorry!