Realtime means different things in different contexts. If I can watch a webcam of freeway traffic, than 5 seconds delay is, for all intents and purposes, realtime.

If we talk about medical equipment, it may be very different based on the equipment.

Real time OSs advertise maximum guaranteed latencies. 0 latency does not exist in the physical world, the speed of light can’t be convinced to hurry up, unfortunately.

Would you consider zoom call with someone on the other side of an ocean "realtime"?

If so, I don't see how this is any different. If not, that's a pretty narrow definition of realtime given the context.