Nope. At least not yet. I recall a podcast interview where it was stated they would eventually develop their own OS.
Discussion
Really wish they didn't . Their own os means they won't want to release firmware for their devices. If they released all the drivers and firmware people would be able to create graphene os distributions ASAP without any cost to them.
Sad to see they wanna take that route
https://www.daylighthacker.wiki/roms 👀 Even Linux support is listed.
Click on "embark on your Linux journey" link, it's blank. Does it work? Is the screen functioning user Ubuntu touch? Sleep/wake? Etc