A video somewhat relevant to this setting:
Rocket U-Boats: V-1 Missile Attack New York 1945 (it's a bit under sixteen minutes long). Obviously, Germany on Earth-2 is rather further along than they were in our 1940s, but even in OTL, they could potentially have done a lot more in that direction if they'd had more time, or if they'd had different priorities in terms of which projects got how much funding and personnel. Still wouldn't have saved them, of course, and as you might have guessed, it won't here, either.
Mark Felton Productions has a lot of interesting stuff about WWII, for those of you who are curious (and have time).