Yes! The Framework Laptop Chromebook Edition supports Borealis (Steam on ChromeOS). To enable Borealis:

1. On your Framework Laptop Chromebook Edition, switch to Beta channel.
2. After updating, navigate to chrome://flags. Set #borealis-enabled to Enabled.
3. After restarting, open the ChromeOS launcher, search for Steam, and select the top result.
4. Follow the setup flow to install Steam.
5. Log in with your Steam account and start playing!