No need. That document explains the fluids,as it should. What an excellent source (same as the IATA De-Icing guidelines) but logically no reference to any specific plane let alone configuration.
EDIT: no excuses, really.
What the OP may be alluding to is that the OEM does not specify or verbosely prohibit wing de-icing with surfaces extended.
The way the manual is structured [PRO-NOR-SUP-ADVWXR "A" AIRFRAME DEICING/ANTI-ICING PROCEDURE ON GROUND], the described procedure does not connect to the normal flow of activites pre-start or after-start in the crew SOP section. Given the high level of integrity and consistency of the OEM FCOM, this non-embedding raises questions and is one of the weak links.
However, drawing a conclusion that de-icing during taxi is done with flaps out might be perilous.
Last edited by FlightDetent; 22nd Nov 2022 at 18:25.