I never said that
you should read the note for the ConnectSSID method carefully App Inventor Extensions: WiFi | Pura Vida Apps
Note: Android will get more and more restricted. The ConnectSSID method does not work anymore starting from Android 10.
According to this Stackoverflow answer: For API30 we can use a new Intent action, for API 28 and below we can still use the old way of adding Networks, but for API29 we have some kind of gray area where I was not able to find a good solution yet..
Meanwhile App Inventor targets API30 and I could take a look into this issue again. If you are interested in sponsoring the update of this method, please contact me by email. Thank you.
Taifun