You can use push notifications or setup a websocket server to push data to the client. If you're trying to figure out how to get data from db, postgres has pubsub or you can use django signals as well.

i would suggest never use signals for anything. https://lincolnloop.com/blog/django-anti-patterns-signals/

Usage of signals should be kept to minimum due the way it works (stays hidden, not async ….) Also, for data you can either use websockets or SSE (server side events)

Checkout Django channels