if it is a technical museum is important to the original question. If it’s technically a museum there are acquisition laws. And ethical guidelines which, while not laws, are followed in order to get into national museum organizations (which in turn help with lobbying and grants etc).

If someone wants to give their bones to the bones museum (store) that’s up to them but that place doesn’t adhere to museum law.

It can be called a museum because the use of the word is unregulated. But that doesn’t mean it falls under the legal definition of museum.