Let's use the verizon.net email settings 2021mentioned below to setting up your AOL Verizon account on your iPhone device.
Incoming mail server (POP3): pop.verizon.net.
Incoming mail server (IMAP): imap.aol.com.
Incoming Server Port Numbers: 995 or IMAP-993-SSL.
Outgoing mail server (SMTP): smtp.verizon.net.
Read also: https://emailscrunch.mystrikingly.com/blog/how-about-verizon-webmail-smtp-settings