That's not equivalent because German household breakers are typically 13A, which is less than the 16A that extension cord is rated for. A 2.5A rated Europlug cord[0] is the closest equivalent, but safety standards help there too. Higher-current devices use Schuko, which will not readily plug in to Europlug.
I found an easy way to create an unsafe combination on German Amazon: a Europlug to IEC C8 cord into a C8 to C13 adapter. That's much harder to do by accident than the American version.
So, here's my equivalent: https://www.action.com/de-de/p/2520398/pro-max-verlangerungs...
Germany's mains is 230 volts, so the 3680 watt limit implies 16 amps.
Other than hard-wired things like the oven and heat pump, I'm not sure my house has even one single item that draws 3.7 kW…