Unless you make it a point to procure an LTSC version, which Microsoft won’t even sell to you unless you have a site license.
LTSC is the only version of Windows that behaves like it’s still your computer, and I have uptime measured in months on a computer who serves Plex all day long.
I’ll be the heretic here, but so far as I know you are only required to make source available when you distribute binaries. And for that matter, it doesn’t even have to be online just available upon request unless you’re using a derivative GPL that added online access as a clause.
I highly doubt the users of a web interface are required to be given access to source. There are multiple GPL-licensed web servers (I am well aware Apache is not btw) and I’ve never seen one embed a code link on every page.
Tl;Dr: Lemmy does it, but I believe it’s not required. Modify away if you so choose.