nope. it's an android TV built on nvidia jetson I think its called.
i've never looked into any sorta custom stuff though. They're more popular than you'd think. Likely because its the only common hardware solution for streaming 4K60HDR from PC>>another device in the home. Steam sync and Moonlight do a decent job, specially if you have a nice new NV GPU but shield still wins out in image quality & user experience. It also has PLEX
R.I.P. Zawarudo, may you OC angels' wings in heaven.