Same question here!
There is some bookmarklet here for Lantern https://git.fiatjaf.com/lantern (see readms) but its for bookmarking only. But I guess this could also work for creating highlights too
Discussion
On iOS both Nostur and Damus can do this, in Safari select text on page and share
How? 👀 Can you share a screencast demo with this? I don't have (or can find) this feature on my iOS device.
Awesome!!
Could this work on other ios browser too? I use Brave..