I just put my inreach device out on my back deck and sent myself a test email and sms–seems to be working fine. I can't log in to manage my account, but their status page claims that the critical inreach services (SOS and comms) are up and running: https://status.inreach.garmin.com/

Yep just tried mine too. Well, that's a relief.

Everything inreach is up except for billing, it's a separate system: https://status.inreach.garmin.com/