Yes, in current versions of the program.  Just separate the email addresses with a semi colon.  You have only about 50 characters so you may have to limit the number of addresses.

Unfortunately, the two email addresses are long so I can't get them to fit, was hoping for another option

Before Sage made the change to allow multiple email addresses we could use the name of an Outlook Email Contact Group.  Set up a group of email addresses in Outlook, give it a specific name and then enter that name in the customer email field.  I have not tested this in about 10 years so it may not work since they added email address validation.  But it is worth the test if you need it.