From the docs it seems we should be able to get a single bitstream but it doesn't seem to work:
In [1]: from dspace_rest_client.client import DSpaceClient
In [2]: d = DSpaceClient(api_endpoint='https://demo.dspace.org/server/api')
In [3]: my_bitstream = d.get_bitstreams(uuid='2f0bfea5-b7c8-4318-9082-3bfe0e6c85b3')
2025-09-16 07:37:05,820 - Trying to find 2f0bfea5-b7c8-4318-9082-3bfe0e6c85b3
In [4]: type(my_bitstream)
Out[5]: NoneType