Hi. Yes, I can confirm. I have LO 22.214.171.124 on ubuntu 20.04. When I press F1, it opens a browser with address: file:///tmp/lu18302293odos5.tmp/NewHelp0.html and says 'file not found'.
This is a totally wron path. Have a look for your LibreOffice program installation.
here is a part of the link, which has been shown in my browser file:///…opt/libreoffice7.3/help/de/text/shared/guide/startcenter.html? The help for Germany ("de") is installed.This is an installation with original packages from LO on a rpm-Linux-System (OpenSUSE). So it might be different to your Ubuntu-installation.