Similarly to Twenty Twenty-Four, we have some full page patterns in Twenty Twenty-Five that are intended to be used without a title when a page is created. The theme will benefit from a "page with no title" template taking the same approach, so we can have pages like the examples below:

This is what that template looks like in Twenty Twenty-Four:

<!-- wp:template-part {"slug":"header","area":"header","tagName":"header"} /-->

<!-- wp:group {"tagName":"main","style":{"spacing":{"margin":{"top":"0"}}}} -->
<main class="wp-block-group" style="margin-top:0">
	<!-- wp:post-content {"lock":{"move":false,"remove":true},"layout":{"type":"constrained"}} /-->
</main>
<!-- /wp:group -->

<!-- wp:template-part {"slug":"footer","area":"footer","tagName":"footer"} /-->

I can imagine the margins between these sections will have to be 0 for the template parts and content to have no awkward blank spaces between them.