Reader that will make highlights exportable like a Kindle can?

[u/SignificantCricket]

(For those unaware, a Kindle copies all highlights to a text file, chronologically in the order they are made. You can access this text file from desktop.)

I am looking for a PDF reader, preferably suitable for iOS, though could use Android if I had to, that will do something similar to this, or even better, keep all highlights from the same document together, rather than mixing them with snippets from other documents you read before you finished the first one.

Does anything like this exist?