It was my understanding that the android security model doesn't allow this - specifically the settings permission let's you connect to a new network, but not to get the password back for an already saved network.
At last my Pixel 3a have that option. On the network settings you can click "share" and it will give you a qr code as well as show the password in cleartext in the screen. It does require you to enter your password or scan your digital to go there.
