You were right to be skeptical!
The news about the alleged “world’s oldest pyramid” discovered in Indonesia caused quite a stir, but it has been debunked by much of the scientific community.
The original study was published in the journal Archaeological Prospection, but it was retracted due to serious methodological issues. Furthermore, it was a controversial claim from the start: many experts criticized the conclusions, deeming them unfounded or unsupported by solid data.
In short, rather than a groundbreaking discovery, this is a case of a lack of scientific consensus.