Looking into the Export APIs, there doesn't seem to be a batch-style API. Instead, in Logic Apps, you can use the foreach loop to call this action multiple times by looping over an array of legal entity IDs.
Note that by default the foreach loop runs in parallel and depending on your use case, you could set it to run sequentially instead, especially if you are updating variables within the loop.
Also, if you need to process each of these separately, you could pass an array of IDs and trigger multiple runs as mentioned in the docs.