I asked the AOPA for an update and received this response:
"As you are probably aware, AOPA initially reached out to the Mexican authorities a year ago-
https://www.aopa.org/news-and-media/...ental-aircraft. While we did receive a response from AFAC in June of 2021, we did not feel it provided the necessary clarity we desired. We followed up with a letter to AFAC requesting clarification of whether Mexico has given permission to US registered experimental aircraft to operate in Mexican airspace. Unfortunately, due to constant workforce changes within AFAC, the increased militarization of the civil aviation sector, and Mexico's continued Category II status--
https://www.reuters.com/world/americ...22-2021-08-31/, getting a response has been a challenge.
While I wish I could provide a defined timeframe to a resolution, I do want to let you know we are currently working with our connections to obtain in person meetings with AFAC to inform them of the importance and economic benefits of the US general aviation community in Mexico.
We appreciate your interest and concern in this issue, and welcome any additional information or feedback you might be aware of."