I have no thoughtspot experience, but at first glance i see no link between date hub and embedding thoughtspot.
Data hub is a way to catalog and find data stores in an organisation. I see no obvious relation with embedding charts.
For a thoughtspot chart, you could investigate page level embedding using an iframe. https://docs.thoughtspot.com/software/latest/embedding
But again, i have no thougthspot experience. Maybe someone else here does?