Not really. In no way was the Aldabra Rail rediscovered in 2020 - it has been known since its initial discovery in 1879 and is relatively common on the atoll.
That article is one of the many very poor examples written by people who don't understand what they have been reading, and claims "the flightless brown bird has recently been spotted – leaving scientists scratching their heads as to how – and why – the species has come back to life".
The reason there are so many articles about the Aldabra Rail and iterative evolution at the moment is that a paper was published last year about how Aldabra Atoll was entirely submerged between 136,000 and 118,000 years ago. The island group has extremely good fossil deposits, from which the authors could show that the flightless rails which lived there at that time were succeeded by flighted individuals (i.e. the previous flightless form of the White-throated Rail became extinct and, after the sea levels had lowered, new colonists flew in from Madagascar or somewhere similar). In a short space of time - in the region of 20,000 years or so - the new population also lost the power of flight and created a "new" Aldabra Rail.
The Aldabra Rail didn't "bring itself back to life" as some articles would have it - one flightless form became extinct and a different flightless form developed in its place at a later date.
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