How to have two E-ink monitors? one on HDMI, one on USB

Hi, my laptop has only one HDMI port, and it has no VGA port. The HDMI port is already occupied by Dasung Paperlike pro.

Is it possible to have two e-ink monitors as extended displays [not as duplicates], by connecting Boox Max [either Max Carta or Max2] on USB? Has anyone actually tried this with success?
If so, does this two e-ink monitor solution only work with Max Carta [Because Max2 requires a HDMI connection presumably in monitor mode, which wouldn't work in my case since it's already occupied]?

I have a severe dry eye problem and cannot look at LED or LCD displays anymore. Just one e-ink monitor is too small of a visual workspace for a programmer.