The upcoming AMD Ryzen 7 5700U and Ryzen 5 5500U have already shown up at Geekbench. It appears that a notebook maker called TIMI is currently evaluating the new AMD Ryzen series. AMD Ryzen 5000U series CPUs are expected to be announced at CES 2021.
AMD Ryzen 7 5700U is an 8-core and 16-thread CPU featuring a boost clock up to 4.3 GHz. This APU is a major upgrade from the Renoir series as it has SMT (multi-threading) enabled, 200 MHz higher clock speed, and 1 GPU Compute Unit more (8 in total) than the predecessor.
The Ryzen 5 5500U, on the other hand, is a six-core APU that will also support SMT, but the maximum clock speed has not changed (4.0 GHz). It will however have 1 Compute Unit more than its predecessor (4500U).