Baudrates like 110, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 115200, 230400, 460800, 921600 are rather standard, but what do you use to set 10Mbps?
Testing with a Windows PC I manage to get 2Mbps as shown here, but Windows is not able to open higher frequencies. I am in this case using USART6 on STM32F405 capable of 10Mbps speed, so it’s Windows that is the limitation.