nolanz:This is what happened the last time and despite Civil Defence being advised, they appear to have ignored the problem.
Many many phone users would not be able to recover the message to read it.
I expect Thats a phone maker thing. Not a government thing. (And it's a test, not the real deal so may not have the same attributes)
Found mine just fine.. it's easier on iPhone with the draw down bar. But android's had it for a while. Its part of the core play services like the covid eni.
Some bury it in messages. Some in phone settings -alerts. On mine its as simple as going 'emer..' in setting search and boom. Multiple emergency alert related menus/setting