With Onshape unless you pay them money your files are public. You can't use the free version for commercial use. Some advanced features are blocked like simulations.

The cloud act requires a warrant, this is them just demanding access.

"The CLOUD Act primarily amends the Stored Communications Act (SCA) of 1986 to allow federal law enforcement to compel U.S.-based technology companies via warrant or subpoena to provide requested data stored on servers regardless of whether the data are stored in the U.S. or on foreign soil."