I have no idea about that compilation issue you get. Since the emacs snaps (pgtk and x) are pre built binaries, you wont get that problem. Ive been using Emacs PGTK from snaps on WSLg for a year without any issue.

You can also install pgtk emacs directly from snaps when under Ubuntu in wsl, if you prefer.

I have my bookmark file as a bookmark itself: C-x r b -> mybookmarks
then it can look as simple as this:

(("init.el"
  (filename . "~/.emacs.d/init.el"))
 ("early-init.el"
  (filename . "~/.emacs.d/early-init.el"))
 ("bookmarks"
  (filename . "~/.emacs.d/bookmarks")))

it is shared between different machines without problem.

should maybe contribute to Elfeed directly as a plugin