preFooter dateModified is not rendering the provided date string value - Power Pages

[alfredofosu]

When refreshing the page, the dateModified field incorrectly displays the current datetime rather than the expected string representing the page's last modified date in Power Pages. The intention is to utilize liquid syntax to assign the page's modification date as a string to dateModified using the following code:

dateModified: "{{ page.modifiedon | date:'yyyy-MM-dd'}}"

Within the HTML source code, this appears to function correctly, as shown here:

However, the output rendered on the pages reflects the current datetime, not the last modified date of the page: