Fresh installation gets 403 error when non-administrator user tries to access a page
What do you have at /wp-admin/admin.php?page=CiviCRM&amp;q=civicrm%2Fadmin%2Faccess%2Fwp-permissions&amp;reset=1? You probably just need to set up permissions.
More info here: https://docs.civicrm.org/user/en/latest/initial-set-up/permissions-and-access-control/