According to the Google Play Store tracker (via Windows Central), it looks like Edge for Android has managed to pass 1 million downloads following its exit from beta last week. This seems to suggest that many Android users are at the very least curious about how Edge will perform on their phones.
Also given that Windows is the most popular desktop operating system in the world, the ability to sync Edge’s mobile features with its Windows 10 counterpart probably comes in handy as well. Microsoft has in the past gotten a ton of flak over its Internet Explorer browser, and Edge is meant to represent a new direction for the company, and so far its popularity on Android seems to be a good sign for Microsoft.
That being said, download numbers are just part of the overall picture. A more important question is how many users will continue to keep using Edge on their phones, a question that has yet to be answered.