It is certainly possible to resend email invitations or campaigns to a guest if their email address has been changed or updated. You can do so from the sent emails section of the platform.
Step 1: Navigate to Emails Communications > Sent and locate the email you want to resend
Once you've located the email you want to resend, click on the three dots and then select 'Add Recipients'.
Step 2: In Add Recipients section, locate the guest(s) and resend the email