PDF editing: Samsung Galaxy Tab S4 or Boyue Likebook Mimas?

Hi,

I am interested in editing PDFs.
- Highlighting sentences and underlining words with the pen.
- Exporting the result as a new PDF.

In case I purchased an E-Ink reader, I have narrowed down my search to the Boyue Likebook Mimas.

BUT I wonder if I could have the same features in a Tablet (such as Samsung Galaxy Tab S4)

My questions:

- Is there an Android app that allows doing this kind of editions with PDFs?
- Is there an Android app that allows highlighting EPUBs and exporting them?
- Is there an Android app that allows browsing an EPUB cycling through each highlighted sections (in the same way as the Kindle software allows)?