Apple in particular very much has a culture of "errors don't happen" and try to gaslight you when they do. Stuff like having zero insight into sync processed and Apple Music just silently skipping to the next song if it fails to stream.
/s
In my case I had a country name accidentally put in a region field, but it didn't look out of place because field labels are missing when filled in. Frustratingly, your contact card with that address will show a map preview that when tapped opens maps with a pin in the right place, so there's clearly some logic to "fix" incorrect addresses somewhere.