During the live stream today the team announced the DevAlpha will be available in late October. Yay!
Unfortunately, it came with the caveat that it would only be for marketplace developers.
How can non-marketplace developers verify their apps work and install properly with MSFS2024 prior to the release date? There are tons of apps that do not ship through the marketplace: Navigraph, SimToolKit Pro, vPilot (VATSIM), MobiFlight, Spad.next, AxisAndOhs, etc.