Anyone working on Netgear RBR850?

Is there anyone working on OpenWRT for the Netgear Orbi RBR850? I also have an unused set of the prior edition (can't recall the moniker).

I read that these units actually run a heavily modified version of OpenWRT (is that correct?).

I've observed that Netgear seems to move quickly from model-to-model, as does their active development (it seems), so having a third-party replacement firmware would be better for advanced consumers I'd think.

Thanks.

https://fccid.io/PY319200453/Internal-Photos/Internal-Photos-rev-Part-1-4433134

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