probably because the idea that the Royal Navy and British Empire post 1900 would have any reason to invade the United States is ASB or requires a POD much further back than OTL up to 1900
and the Germans didn't have a big enough fleet or merchant marine to do the job after 1905 (not to mention the logistics issues and the refueling bases)
that doesn't require screaming tits off, it is hard math
also 100 BB? do you mean 100 warships in total? because no one since the Napoleonic era has ever had 100 BB (which is the short form of battleship)
I don't suggest a pod, there aren't any, but that doesn't mean that the British and Germans lack the warships and fully equipped divisions available at short notice to defeat the pre ww1 usn and army. I meant 10 bbs or so, I have no computer at the moment and am winging it on the ps4 and phone.