Wikipedia - Liga de Expansión MX

The Liga de Expansión MX, also known as Liga de Desarrollo (Liga BBVA Expansión MX for sponsorship reasons), is a Mexican professional football league founded in 2020 as part of the Mexican Football Federation's "Stabilization Project", which has the primary objective of rescuing the financially troubled teams from the Ascenso MX and prevent the disappearance of a second-tier league in Mexico, for which there will be no promotion and relegation during the following six seasons. The project also attempts for Liga MX and former Ascenso MX teams to consolidate stable projects with strong administration, finances, and infrastructure.