Welcome @tncentralap, There is another discussion started by @drwass2 that mentions the Remede device that might be helpful to scan through.
-- Central Sleep Apnea, Anyone try supplemental O2 via nasal canula
https://connect.mayoclinic.org/discussion/central-sleep-apnea-anyone-try-supplemental-o2-via-nasal-canula/
I did find a research article from 2020 about the device that may set your mind at ease.
-- Transvenous phrenic nerve stimulation (The remedē System) shows sustained safety and efficacy through 5 years: https://remede.zoll.com/press-releases/transvenous-phrenic-nerve-stimulation-safety-efficacy/.

It's great to hear you have a good rep from Remede monitoring your device. Are you able to discuss your concerns with the rep?