Poor content of <https://help.libreoffice.org/index.php?title=Swriter/.uno:HelpIndex&Language=en-US&System=UNIX&Version=5.4&redirect=no> etc.
In builds of LO configured to use the online help (like the 5.4.3 flatpak available through <https://flathub.org/apps.html>), doing "Help - LibreOffice Help - Read Help Online" causes pages like <https://help.libreoffice.org/index.php?title=Swriter/.uno:HelpIndex&Language=en-US&System=UNIX&Version=5.4&redirect=no> (with URLs details depending on LO version, OS, etc.) to open in the browser.
However, those pages content currently is just a redirect page (which doesn't automatically redirect, presumably because of the "redirect=no") with some obscure content like "Common/Help#bm id3149178" linking to <https://help.libreoffice.org/Common/Help#bm_id3149178>. (And where the latter isn't even the main Writer help page <https://help.libreoffice.org/Writer/Welcome_to_the_Writer_Help>, but rather help about LO's "Help" menu.)