Thunderbird works just fine with a verizon.net email address.
Add your verizon.net email account in Thunderbird. You will specify your name, email address, and password. Thunderbird will lookup the settings necessary for pop and smtp servers.
Verizon/AOL email only works with email clients like Thunderbird if you turn on "Allow apps that use less secure sign in" in your AOL security settings. This is something that they say they are disabling on March 2, 2020.