Over here there is no standardised way of sharing such info between doctors/hospital/care givers. I have been through multiple GPs because some stopped working, some where to far away after a move and so on. I had to bring my data to them and good luck to me if I hadn’t gotten a copy of something when it happened. I had to stop medical personnel from giving me paracetamol (I have asthma and shouldn’t take any of that or anything like aspirin), the GP of my SO had to basically partly roll back a medication plan he had gotten from the hospital after being in the ER and those are mild cases where nothing did actually go horribly wrong. My SO got two incompatible medications about two years ago because the tool that crosschecks the database did not throw the relevant warning correctly. It messed with his brain chemistry a lot. His GP wrote the programs makers to have them remedy that asap, since it was pretty bad.
I actually use the health app medication reminder/tracking now and have seen that the app can theoretically store data from health professionals about me. It looks like it is completely unused in the country I am in and I can’t manually add in data at all. This would be super helpful in some cases where I could use it to quickly convey key points about my health, especially when I am not as present (high fever, accident or some such).