You can! The agent can be installed on almost any linux flavor, and is open source on GitHub, so it can be compiled and installed on any EC2 machines (or on-prem machines) you want. (This might not be easy, I haven't done it myself)

If you can make a good case for it, open a ticket or make a stink on the forums and there's a chance an engineer can be tasked to add it to their list of Officially Supported Platforms. This is how eg raspbian got added, though I don't know if the program is still running for adding platforms as it's been a few years.