There actually is a CD-R version of this (confirmed on this website:
https://10th-paysage.tumblr.com/ ). mamomo told me through email when I asked if he had any on-hand that he had planned on this album being mainly a download release, so they only printed a small number of CDs. They were sold at M3-2019 (Fall).
Here's his exact quote:
「「Paysage」の在庫はもうないです。(ダウンロードを前提として作っていたので少数の生産でした) 」