Not currently - it only shows the number following the channel not who. I think this would be good - even if it were optional and configurable by Stream Admins - so I have raised a uservoice for it here which you can vote on and push up the agendahttps://techcommunity.microsoft.com/t5/Microsoft-Stream-Ideas/See-who-is-following-a-channel/idi-p/9...
To note about Uservoices they may take a long time to get picked up so I would also raise at the next Stream AMA. I am booked into a meeting with the Stream team at Ignite so will also raise it there if the opportunity presents
Hope that answers your question!