Are you sure about that page number? 7-19 thru 7-21 is the take off procedures in “block” format. No verbiage about RNAV anywhere.

7-22 talks about RNAV, but nothing has changed from Rev3B that I can find. (CFM 10-2)

7-16 does get rid of the requirement to select HDG or NAV mode at 400’. (Rev3B CFM 10-19) Now to be selected right after speed mode at V2+10, at V2+10-15 KIAS.

FOM 8-12 already requires the FD and LDI for all RNAV SIDs, and recommends use of A/P.