Tangential, is there any good smooth scrolling PDF viewer (for windows at least), that offers some level of customisation of view? (Like 2 pages side by side, and ideally dark mode and full top to bottom pages with hidden toolbars.)

Adobe Viewer (? not sure of the name) was the only adobe product that had this ability afaik, and while I managed to get an old exe, it's been discontinued unfortunately.

The closest appears to be Xodo PDF with pretty much all features, but it has a ton of popups.