I want to buy open source drm free e-books however I see Kobo that is a Canadian subsidiary owned by a Japanese Company while Apple is American with some operations based in Canada, California is closer to British Columbia however they often use closed standards.
Sorry that initial question was meant to convey that E-ink.
OP appears to either have no E-Ink display experience or that is not a hard requirement.
FWIW, you can use calibre to manage your E-Books. Yes, there are sometimes artificers but IIRC they support mobi too (I apologize if that’s the wrong format I actually haven’t used my kindle in about a year)