Even though AMD did not show any ray tracing game benchmarks, it at least mentions a few metrics in a footnote from the RDNA 2 architecture overview. Team Red tested an unspecified RX 6000 model with the DXR SDK more than 2 months ago and the performance seems to be a bit higher than the RTX 2080 Ti, but still lagging by 33% when compared to the RTX 3080.
https://www.notebookcheck.net/AMD-sneaks-additional-details-on-the-expected-RX-6000-series-ray-tracing-performance-in-the-RDNA-2-overview.499940.0.html