@VVncnt 

Isn't the smart bulb now configured successfully via the Android phone? You don't need to do it again on your iPhone, simply log in with the same account then you can see and manage the smart bulb in the Tapo app.

From your description, it seems the device fails during the connection step after entering the Wi‑Fi password, is that right? When you tried setting it up with a different phone, were you in the same location and was the bulb connected to the same Wi‑Fi network? If you were connecting to a different network, the issue might not be related to the type of phone you’re using.

If your devices still aren’t set up somehow and you currently only have an iPhone, you can follow the troubleshooting steps in this article. What should I do if I fail to configure the Tapo devices