Unable to turn off WiFi auto connect

I have several WiFi connects including some range extenders and some printers..
I only want one of them to auto connect.
But if I turn off the autoconnect button, it won't stay off.
I change to look another WIFi source (not connect, just examine), then examine what I turned off, they are back on again.

How do I save the autoconnect choice for each stored connection name?

Windows only remembers the auto-connect setting if you change it in Manage known networks, not from the quick Wi-Fi menu. Open Settings go to Network and Internet then Wi-Fi and edit each saved network there to turn off auto-connect. If multiple devices share the same network name, Windows will still treat them as the same connection.

Settings -> Network and Internet -> WiFi
Then: Show Available networks --- no change. I turned off autoconnect on 4 SSIDs, then rechecked and they reverted to auto.
And: Manage known networks --- the list doesn't show the same SSIDs from Show Available.
All of the noise SSIDs like printers, Roku, etc are missing.