Does the slides template work with docinfo?

[bai-yi-bai]

Hello, I'm dipping my toes on using AsciiDoctor-Web-PDF more, but it's been many years since I've done frontend HTML/CSS development. I'm trying to modify the slideshow template, to add four pieces of information: bottom-left: slide number, bottom-center: a motto, bottom-right: an SVG logo, and I'd like to add an asciidoctor-controlled attribute to control an optional text which is stamped onto the slide.
I was able to use the pseudo elements slide.before:: to put the slide number in the bottom right, and slide.after:: to put the logo, but that's the extent I figured out. My thought was that, potentially I could define a

in the footer with additional child elements with flex boxes. I see in the documentation that there are docinfo options, but I couldn't get them to work with the ioslides template.