has quietly announced that it's finally adding ePub support to Kindle in late 2022, though you'll have to use Send to Kindle
You're Going to Be Sorry You Bought That Kindle
Self-Publishing on : A Step By Step Visual Guide
Kindle finally supports ePub but will kill MOBI - Boing Boing
Kindle vs Kobo: Choosing the Right E-reader Ecosystem
Kindle e-readers finally (kind of) support ePub books
Kindle Scribe review
Old Kindle e-readers won't be able to buy new e-books soon
to half-heartedly support ePub on Kindles
Kindle Oasis Review
s Kindle will finally support ePub files
s Kindle will finally add ePub support
Kindles now support EPUB books (sort of), but MOBI and AZW
Dropping MOBI Support on Send to Kindle Apps