No Hook for wp-rss2.php who permit include a xsl

There is no hook in the top of wp-rss2.php (and wp-commentrss2.php to) for include simply with a plugin a xsl file.

Also we must made a hack:
https://www.tuto-fr.com/tutoriaux/wordpress/xslt-css-pour-rss.php (fr)

For have this result:
https://www.billyboylindien.com/blog/feed/

What about including a hook in new version ??

I’m a really newbie in wordpress plugin, also maybe I’ve left somethink.

Thanks