Hi, WDNJSQ.
If LACP is enabled on an Eth-Trunk, the Eth-Trunk does not support the hybrid rate. If LACP is not used, the Eth-Trunk can be composed of 1 Gbit/s and 10 Gbit/s interfaces. The weights of the interfaces can be adjusted to achieve 10:1 traffic load balancing. Let me know if my solution works out for you.