Unable to Download Full Dataset: Only 27 of 55 Datasets Available

Hi, thank you for your impressive work and for generously sharing the dataset.

I'm currently trying to download the full dataset, but I've only been able to successfully download 27 out of the 55 datasets. For the remaining datasets, no files were downloaded, and no errors were reported by `gsutil`.

Here are the details:

Initially, I attempted to use `tfds.load({dataset_name})`, but all datasets returned a `Dataset not found` error. According to the instructions in the README:

> If you run into this issue when trying to run tfds.load({dataset_name}),
> Try downloading the dataset manually by running
> `gsutil -m cp -r gs://gdm-robotics-open-x-embodiment/{dataset_name} ~/tensorflow_datasets/`
> Once you download the dataset like this, you can use the dataset with the regular `tfds.load({dataset_name})` command!

I followed this suggestion and used:
```bash
gsutil -m cp -r gs://gdm-robotics-open-x-embodiment/{dataset_name} ~/tensorflow_datasets/
```
However, only the following 27 datasets were downloaded successfully:
```bash
asu_table_top_converted_externally_to_rlds cmu_play_fusion kuka
austin_buds_dataset_converted_externally_to_rlds cmu_stretch language_table
austin_sirius_dataset_converted_externally_to_rlds columbia_cairlab_pusht_real nyu_door_opening_surprising_effectiveness
berkeley_fanuc_manipulation dlr_sara_pour_converted_externally_to_rlds stanford_hydra_dataset_converted_externally_to_rlds
berkeley_gnm_cory_hall eth_agent_affordances stanford_robocook_converted_externally_to_rlds
berkeley_gnm_recon furniture_bench_dataset_converted_externally_to_rlds ucsd_kitchen_dataset_converted_externally_to_rlds
berkeley_gnm_sac_son iamlab_cmu_pickup_insert_converted_externally_to_rlds utaustin_mutex
berkeley_mvp_converted_externally_to_rlds imperialcollege_sawyer_wrist_cam utokyo_pr2_tabletop_manipulation_converted_externally_to_rlds
cmu_franka_exploration_dataset_converted_externally_to_rlds kaist_nonprehensile_converted_externally_to_rlds utokyo_saytap_converted_externally_to_rlds
```
I’ve also verified that some of the other dataset folders (e.g., `bc_z`, `berkeley_autolab_ur5`, etc.) exist in the bucket but appear to contain only folder markers (i.e., no actual files). Attempts to list or download them return no results or errors like `One or more URLs matched no objects`.

Could you kindly clarify:

- Whether these datasets are expected to be publicly available?

- If so, is there any additional step needed to access or download them?

Any guidance would be greatly appreciated. Thanks again for your great work!