You pose an interesting point/question/issue. To my knowledge, there’s no way to get a definitive list of all the people in Zwift whom you follow and who follow you, but kudos to you because it’s a great idea! If such a feature exists, it’s deeply buried in the Companion app in a location which is not obvious. I “+1” voted your idea to get that list added to the Companion app, and hopefully one day it’ll happen.
Here’s what I do know about the app:
If your Companion app is connected to “GAME” mode, you’ll find a section in the app where it displays “Zwifters Nearby” and “Zwifters You Follow”. The “Zwifters You Follow” section is actually not a full list of those Zwifters. It’s intended to display all the Zwifters you follow who are currently Zwifting or “nearby” in Zwift.
I think the point of that feature is to let you know which Zwifters you follow are in the app so you can join them if that’s your wish. Since it’s simply worded “Zwifters You Follow”, I can definitely understand if there’s any confusion on that point, but I hope that helps to clear things up for you.
It’s also impressive that you took the time to count 200 followers (approximately?) online and Zwifting from that section of the app. That’s more patience than I have.
The only other place in Zwift Companion (ZC for short) I know of that’ll display information on the Zwifters you follow (and those Zwifters following you) is the “ACTIVITIES” screen. That screen is only available when the Zwift Companion app is not connected to the Zwift game app (ZC always defaults to the “HOME” screen when you’re not logged in to the Zwift app simultaneously). The “ACTIVITIES” screen (located next to “EVENTS”) will display the Zwift activities from those followers so you can see what they’ve been up to, however, if you’re following a lot of Zwifters (which you are), anyone who hasn’t Zwifted in a while will not appear anywhere near the top of that activity list.