Aoe4's closed beta finally is starting on August 5th. If you want to participate you can signup by following the instructions on the news post: https://www.ageofempires.com/news/aoeiv-closed-beta/
Looks like this beta will be really short, running only from August 5th through August 16th.
Looks like this beta will be really short, running only from August 5th through August 16th.