Well, with the pandemic and the airline industry grounding a lot of their aircrafts. It’s understandable that you would be getting few live traffic. I know I also had a few slow days where I couldn’t get any Live Traffic to show. But since WU6 I’ve been getting them and my ATC chatter always have some live traffic communicating with each other.
It might also helps to check your settings to make sure all the data options are all On, as well as you’re connected to a fast server with the lowest ping number.