Title |?H1 problem

Hi, I am not plugin creator, only user, but perhaps you should try and inspect the class that is holding the specific h1 tag and then add to it printfriendly class, as explained here:

Use the custom css feature and then apply (styling) to the element you want.
https://support.printfriendly.com/button/developer-questions/custom-css-styles

WordPress Only: https://support.printfriendly.com/button/wordpress/create-custom-css-file

Use our custom class names to include/exclude content. Add class=”print-only” to include an element and all it’s child elements. Add class=”print-no” to exclude an element.

https://support.printfriendly.com/publisher/developer-questions/include-exclude-content/

WordPress Only: https://support.printfriendly.com/publisher/wordpress/content-not-selected/

Thanks @528491-1

Or simply add class=”pf-title” to the element you would like as page title.