According to the claim in the documentary it was BritishCommandos who were tasked with attempting to "seize" the Enigma material during the Dieppe Raid and a number of attempts, according to the claim, were made to put the Commandos ashore in Dieppe harbour from HMS Locust.
I am neither going to confirm or dismiss the claim, that an attempt was made to "seize" Enigma material during the Dieppe Raid, because I wasn't there but I can see how it could have been done and I can see how it could have fitted in neatly with the main Dieppe Raid.
As my late Grandmother put it "the "Canadians" had a rough time at Dieppe" but so too did all those at Dieppe from all nations present during the battle.