I'm looking for a Kindle reader app alternative. For reading, not for buying books.

What I would love:
- Android support (I use GrapheneOS)
- as self sovereign as possible
- possibility to send articles from web to it using some kind of browser extension which removes formatting (I've been using Push to Kindle by FiveFilters)
- possibility to send pdf end epubs. PDFs with usable formatting should optionally be shown as an ebook, not literally on page (Kindle would convert pdf to epub like book, which allowed me to read papers formatted for A4 on a smaller screen, zoom fonts). Send to Kindle alternative basically
- the app would remember where I stopped reading for each book / article separately

I know about Pocket Books, LiberaFD and Moon Reader but they don't seem to support last two points which are important for my reading workflow.