It's being reported that Garmin has been hacked and it's corporate network infected with ransomware.
According to below site Inreach webservices are down including I would assume mapshare.
I'm not sure if this effects the SOS functions of Inreach or not but personally I won't be relying on Inreach for SOS until Garmin provides an update on the situation.
https://www.bleepingcomputer.com/news/s ... re-attack/