ICE and Medical ID on play store are both crap.
Maybe not exactly what you’re looking for, but this app could be useful someday: https://github.com/ligi/SurvivalManual It’s also available in F-Droid, but didn’t receive any updates for 4 years. It’s basically an easily navigatable pdf that tells you what to do in a survival situation
In the United Kingdom, people just add a contact to their phone book called “ICE”. You can learn more here.
I dont get it, because the phone is locked usually. So you rely on the faceID on your uncobscious face or a fingerprint if your finger?