You hear the individual call signs when they do a frequency transfer. For example if the were told “hipshot hoodoo contact centre 122.6”
It would go:
Maple Hoodoo push 122.6
You mean hipshot Hoodoo??
The on the new frequency you would get:
”hipshot 1”
”2”
”3”
You mean "Hoodoo 1"??
For the OP, Unless things have changed, the formation callsign would be Maple Hoodoo, and each aircraft would be Hoodoo 1, Hoodoo 2 and so on.
BTW, Hipshot and Hoodoo and subs of Maple.