Hi there!
I'm not tech support, but I'll do my best to offer some advice!
Your printer can only connect to your home WiFi, and that can't be a Hotspot. It also needs to be 2.5GHz, not 6GHz. The printer can't see 6GHz.
If you have a computer, it will be easier to get it setup from there, and you can do that from https://canon.us/MG3620setup
If you try that, and still need help, you'll want to register the printer at https://canon.us/account and then give support a call in the morning. They're available during normal business hours during the week. 😊
