If an admin is only able to see "Once" under frequency in the campaign step 3, then this is happening due to the new permission rolled out. "Schedule Recurring Mass Campaigns" permission will allow admins to schedule recurring mass campaigns with Daily, Weekly, and Monthly frequencies.
Without this permission, admins who can send mass campaigns will only be able to schedule them with Once frequency only.
If further assistance is required, submit a ticket to Punchh Support. (For help submitting a ticket, click here)