Google will be retiring its trusted contacts app for emergency sharing in December and has already removed it from the Google Play Store. Instead, existing users are instructed to try similar but less useful features in Google Maps. This is a shame, because with trusted contacts, you can still find a family member even if they don't answer (e.g. if they are passed out or in danger). However, Google Maps requires it to proactively send its location to you.
The announcement was pretty abrupt:
Google email announcement
Ian Carlos Campbell
Google Maps has been able to share locations in real time since 2017. However, you have to opt for constant follow-up again and keep sharing your location with other people instead of just sending it to loved ones when you don't respond. In comparison, you can use trusted contacts to add people to your contacts who you want to share your locations with immediately in an emergency. When this happens, your contacts can request a status update to see if you are okay, and you can reply with your location to reassure them. If you don't answer, the app will automatically share your last known location so it can ask for help.
When Google originally launched Trusted Contacts, it created this GIF to show how it works:
Adding other apps and features to Google Maps has been Google's strategy for a while, but the Maps feature isn't quite as valuable. And while it's possible the Trusted Contacts app didn't have many users, those who relied on it will have to find something else.
Google will end support for the app in December. However, you can download your contacts from your Trusted Contacts page until the app shuts down. Until then, you can also familiarize yourself with location sharing from Google Maps.