Hi @Karan_Randhawa, and welcome to the Open Targets Community! 
The Open Targets platform public dataset on Google BigQuery is updated with the 24.03 (March 2024 release). The sync happens on a monthly basis.
You can confirm the release version by querying the ot_release table in the open_targets_platform dataset.
The dataset in BigQuery is just a placeholder for all the underlying tables. The timestamp on this dataset only gets updated if the metadata is updated which might not be with every release.
However the data and any underlying tables are updated with every release.
Do let me know if this answers your query.
Best,
Prashant Uniyal