There are no extra macro fields. Behaviour comes from the space and the page (OTP, revoke, custom signature text).
If the space enables estimated read time lock, the button waits on a countdown. The byline does not. See https://support.qc-analytics.com/qc-read-and-understood-for-confluence-cloud/how-to-read-and-understand-a-page#Confirm-R&U-from-the-Signature-Box.
On phones, include this macro if people must confirm on mobile: https://support.qc-analytics.com/qc-read-and-understood-for-confluence-cloud/how-to-read-and-understand-a-page#Confirm-R&U-using-Confluence-on-your-phone