User Profile creation and Registration to a event

Development
1

I am working indico 3.3.6. My use case is .

user profile creation is the first step. Once profile is created then manadatory ask for register for a event. Once the registration is successful then allow for abstract submission and paper publication

This is flow possible in indico 3.3.6 .

Any suggestion to achive this

2

This is flow possible in indico 3.3.6 .

No, not possible. Also, you still need to update (not possible in 3.3.7 either though).