This partnership is pretty big. Bigger than just the partnership with Everton de Viña del Mar. Grupo Pachuca has some pretty substantial clubs:
The namesake, Pachuca, was a founding member of Liga MX (pronounced Em-ECKees) and is the oldest professional club in the country. They've been very successful through their history.
Club León, also in Liga MX, has been a top side for the past few years at least. The Liga MX season is split into two halves with a champion crowned for each half; León were champions for the first half (Apertura) of the 2020-21 season.
Tlaxcala are their third Mexican club, currently playing in the second division. They shuffled this around after the league ended promotion/relegation (at least temporarily.)
They also own Talleres de Córdoba, playing in the Argentine first division. They turned in back-to-back promotions after Grupo Pachuca bought them.
The Mexican, Argentinian, and Chilean opportunities here are great!