Sort of as with Robert B Parker, whose Spenser, Sunny Randall, and Jesse Stone series have been continued by "estate-approved" authors, Robert Ludlum's Bourne series has been continued, first by Eric Van Lustbader, and more recently by Brian Freeman. And the most recent (2022) of the Freeman books,
The Bourne Sacrifice, is on sale right now at Kindle UK for £2.29. This series is not really to my taste, so I haven't read and can't comment on the continuation titles, but I have the impression that it's pretty popular, so here's the info...
Kindle UK:
https://www.amazon.co.uk/dp/B09NCJD2NN
Kindle UK/Smile:
https://smile.amazon.co.uk/dp/B09NCJD2NN