Here is a list of workshops related to a possible ALMA2040. It includes workshops dedicated to ALMA2040 as well as those discussing broader science themes for ESO Expanding Horizons efforts.
ALMA2040: Science Opportunities in the 2040s, Haus der Astronomie (HdA), Heidelberg, Germany, 2025 May 19 - 22
Scientific Goals and Prospects for ALMA2040, Lorentz Center, Leiden, Netherlands, week of 2025 November 24