Start here to understand your warranty.
https://www.flmowner.com/servlet/Con.../Page/HomePage
IMO basically if it affects the engine and components related to engine function. My power steering pump was not, but if you rationalize what a PS pump controls it makes sense (sorta)
I have had belts, pulleys, FICM, turbo, (and related items) HGs, Glow plug harnesses, oil coolers, Y pipe gaskets and egr valves replaced along with any thing else attached to that creature covered under warranty. Heck I even got Ford to regurgitate the 7/200 extended warranty based on my trip thru the dealer with my service Managers help.
You need to find a more knowledgeable or honest dealer. Or you just got hung up on the 100 dollar deductible. Basically Let Your dealer submit all claims and pay the 100 dollar deductible. Sometimes if the problem is related to an emissions component you get a refund. See Emissions warranty in your guide Example egr valves have no deductibles.
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2005 DWL SB Crew 6.0 w/tow command, 4:10 rear end. FICM Repair @75k, (Gift from

7/200 coverage) ScanGauge II, Banks Ram air intake, Coolant Filter, Banks exhaust, ARP Bolts. The whole OASIS

would never fit here!