how can i view my iphone smtp email on my desktop pc?

Add the account to your desktop.

SMTP email? I am not what this is. > Difference Between SMTP, IMAP, And POP3 (+ Comparisons)

If you have a Windows PC with Windows 10 installed, there is a built-in email client. Set up your email in there.

If you have Microsoft Office installed, you can usethe Outlook email client.

You're welcome.