This is just an FYI for you about a POSSIBILITY on converting kindle to epub and removing DRM.
I'm not sure if this is the best place to post this, but yesterday I got an email from dvdfab/streamfab about preordering their new kindle converter.
https://www.dvdfab.cn/kindle-converter.htm
At one point it says MOBI files but otherwise it says Kindle books.
Since it says the longer the book, the longer it will take to convert, I'm guessing with some of their new AI stuff, they might of figured out how to copy/paste with AI?
I dropped kindle books a number of years ago, but i still have been somewhat following what they are doing to get rid of people owning their e-books.