I have and use a resimed that does the phone home option. Once my doctor got what he needed I put it in airplane mode.
Distributor used the stats while I was reporting to call me and tell me I need new filters or other parts. I lol’d and bought them online for way cheaper. They stopped trying even before the doctor got all the data he needed.
Also, AFAICT it’s only data out, so I’m not worried about some exploit being delivered to the machine.
Final thought: I work in med tech. We have better security than credit agencies because we get fined more if we screw up. Personal data leaks are so common no one even cares anymore, but leaking someone’s medical info will shut a company down. You are likely safe, but ultimately never as safe as a “dumb” machine would be except they just don’t exist anymore.
Actual final thought: you will be amazed at how much better you feel every morning after actually sleeping instead of the dirty pseudo sleep you’re currently getting.