Samsung Galaxy Note 10+ is not officially supported by the GrapheneOS project.
List of currently supported devices can be found here:
Many other devices are supported by GrapheneOS at a source level, and it can be built for them without modifications to the existing GrapheneOS source tree. Device support repositories for the Android Open Source Project can simply be dropped into the source tree, with at most minor modifications within them to support GrapheneOS. In most cases, substantial work beyond that will be needed to bring the support up to the same standards. For most devices, the hardware and firmware will prevent providing a reasonably secure device, regardless of the work put into device support.
Which means that if you are an experienced Android developer, you should be able to build GrapheneOS for your device.
I agree that it would be great if the project was able to officially support more devices.
That said, as GrapheneOS is focused on security and privacy improvements first and foremost, this may not be possible to do at the moment.
Keep in mind that the project needs more resources in order to be able to facilitate more requests like this.
Please consider donating. If everybody pitched in, the project would be able to have more full time developers working on all kinds of things!
You can find out more information about donating to the project here: