So far only read:

-- All the Rarest Beasts on Earth by Rachael K. Jones - 2*
Author note: A Lazarus taxon is a species that has been declared extinct for a number of years after disappearing from the fossil record, only to turn up again alive and well. While this isn't the fate of most endangered species--after their numbers drop too low to recover, most of them are gone forever--on their way into extinction, there's always this period of ambiguity between the last known sighting and declaring the creature well and truly dead. Inside this ambiguity, we find a lot of hope. It might ultimately be foolish hope, but I for one like to hope that somewhere on some undiscovered island in the ocean, there's a flock of dodos clinging to the rocks, waiting to be rediscovered and treasured as something irreplaceable--which, of course, was true all along, even when they numbered in the millions.

Iirc, she played with the idea of a missing boy being "somewhere undiscovered". It got a little ambiguous for me, she took a tiger as a stand in for the missing boy etc...

-- Mirror Mirror by Gunnar De Winter - 4*
Black Mirror episode-ish. We follow a social media "fitness guru" around for her morning and lunch routine. Racking up iCloud money and keeping her followers attention with her carefully created facade. Ends with a "that isn't according to plan" moment.