Seems the Mavic range weights don't require too much in the way of legisaltion, a simple fireproof labelling.
This was a recent trhead here on the forum that may help . . .
A while back I posted a video of Munich, and I got some feedback regarding the lawfulness of my drone shots. At the time of flight, I was pretty sure everything I did was legal, but I was later notified that flying near the castle should be avoided. The reason I thought it was legal, was...
mavicpilots.com
Google has some info . . .
Research Delta baggage restrictions and learn what not to bring aboard any Delta aircraft. Find information about traveling with restricted items.
www.delta.com
Lithium batteries
The mission of the Law Library of Congress is to provide authoritative legal research, reference and instruction services, and access to an unrivaled collection of U.S., foreign, comparative, and international law. To accomplish this mission, the Law Library has assembled a staff of...
www.loc.gov
Germany and drones
dronerules.eu
Recreational and professional use
Note, insurance required for over 500gms (all Mavic Pros)
Germany has a Drone Check app
www.dfs.de
Says German language, but found a checklist in English too . . .
I went through checklist, they do have some interesting limits to main roads, hospitals, prisons, police and military, and other such, generally 100m.
I went through that using a Mavic Mini as an example weight sub 250g (well under the stated 500g stated for insurance requirements), to see if I could get through it ok, it still came up with "ATTENTION: You are obliged to take out third-party liability insurance for your unmanned aircraft system!"
Tried to find an app with a drone map like we have here, and like you have in the US, no luck there.