To my knowledge there is no ARM64 build.
You could of course ask at the official DF Forums if Toady would be willing to make one, but given that it’s effectively a new platform, that would require a new (virtual) buildserver (or worse: cross-compilation), I doubt he has the time…
There have been several attempts to play it via Box64 (see MNT Reform Gaming Thread), but performance is an issue, at least on the A311D or the i.MX8MQ. It’s certainly playable, but not very enjoyable…
I don’t know if anyone has tried it on a Rockchip SoM yet. Maybe it runs well enough on those with Box64?