In the default loadouts, ar 234 b-2 has RATO boosters like picture 1.
But while using custom loadout, there are 2 “ghost slots” can’t be select to load anything, and I believe those 2 slots is for the RATO boosters, like picture 2.
And if I using custom loadout in test flight, the RATO boosters are missing, like picture 3.
Additionally, if Gaijin didn’t want to allow us to use the boosters in an air spawn (which I think would potentially be unfair), they could just allow the boosters to be used after rearming or spawning on the airfield, like they are implemented with the current default loadouts. They could even just make a default loadout with 2 250 Kg bombs and 1 1000 Kg bombs as a default option, solving the problem entirely.