Solved
Does the STM32WB55RGVx support DTM over UART?
According to BLUETOOTH CORE SPECIFICATION Version 5.3 | Vol 6, Part F, there are two methods of supporting DTM: DTM over HCI and DTM trough 2-wire UART.
I know that WB55 supports DTM over HCI for sure, but what about DTM over 2-wire UART? It's also supported by this microcontrollers?