Just some stuff I picked out of the Wiki page for the project...
On December 16, 2018, president López Obrador conducted a Mayan ritual to commemorate the start of construction on the Mayan Train project.
The first phase of the project is anticipated to open in the late 2020s, but tourism officials in the region have proposed accelerating work for a 2023 opening.[7][17]
As of June 2021 10% of the project had been completed.[23]
December 2019 consultation
In November 2020 the Regional Indigenous Council of Xpujil delivered a petition with 268,000 signatures to the Campeche Ministry of Environment and Natural Resources asking that the project be suspended because of environmental concerns.
As of January 2021 crews had uncovered more than 8000 ancient artifacts and structures during construction.[38]