For the OINP French Speaking Stream, which is under Express Entry, yes you do.
Having an Express Entry profile requires eligibility to at least one federal immigration stream, either CEC, FSW, FST. For OINP Express Entry, they only consider CEC or FSW.
The harsh thing about OINP is that they only count the last 5 years work experience for FSW. So it's possible to be qualified for Express Entry (work experience from last 10 years is counted), but not qualified for OINP.