[Froide]

Thank you! I'll insert the following PSA in the OP:

Here's the link to the Kindle for Samsung app, courtesy of resourceful MobileReader sakura-panda.

Originally Posted by sakura-panda

You can download and then sideload it from here: https://www.sammobile.com/apk/kindle-for-samsung/

(I don't recall if this is the site where I got it for myself, but I know had to sideload it; I couldn't find it in the store.)