So those things are similar but unrelated and can run at the same time. In removal proceedings seeking VAWA you've generally got two options and you can both:
You can file I-360 with USCIS and file I-485 with the court. Jurisdiction over I-360 always rests with USCIS. Jurisdiction over I-485 rests either with USCIS (not in removal proceedings or not in pre-1997 deportation proceedings) or with the Immigration court (if in removal/deportation proceedings).
You can also file EOIR-42B to seek cancellation of removal, which is what you've done in this case.
Now, both of these have similar but not identical requirements, cancellation of removal for example lets you get around the 2 year deadline to file after death/divorce, it also allows you to seek adjustment even if you were never married to the abuser as long as you have a child together, cancellation of removal also requires a finding of extreme hardship with VAWA cases.
So what now, well you've got a few options:
1. You can file I-485 with the court, refer to this instruction sheet: https://www.uscis.gov/sites/default/files/document/legal-docs/DEFA-pre-order-instructions.pdf or,
2. Alternatively if you don't mind abandoning the EOIR-42B you can file a motion to terminate with the immigration court, and if you get that then removal proceedings will end and you can just file I-485 with USCIS.
To answer this directly, no that's not exactly correct.
I-360/I-485 and EOIR-42B are two different processes, both result in a green card but they're independent from each other. There is no requirement for you have a pending EOIR-42B to file I-485 with the court. Nor does an EOIR-42B require an I-485, if an EOIR-42B is approved then that approval will result directly in an issuance of a green card.