no custom book/pdf sizes on lightroom yet ?

....2020 goes by and i cant make a custom sized pdf book on lightroom? ...what is the book module for? is it just to keep blurb expensive and old as #%& printing services alive?
....and for this reason all of the book module is basically worthing ZERO (to me)!?
i will have to forget all about virtual copies and albuns and export everything to use another software ? all because i cant configure a 30 by 40 pdf page (on lightroom)?????
will these be possible this week ? i need to make a 30 by 40 (cm :)) book (pdf)!
come on ..... please !