<h1 class="page-title>Page Title</h1>Since this is the single h1 element on the page, use the .visually-hidden class to hide it when needed.
This will preserve the heading structure for screen readers vs removing the block from the page.
Exclude Node Title can be used to apply this, using the patch in this issue: https://www.drupal.org/project/exclude_node_title/issues/3521383