How to know UART speed?

Question

UART

Is there any way to find out at what speed the UART is operating from the rx channel diagram using the "SignalTap II Logic Analyzer" logic analyzer?
The remaining UART settings are known (data, stop_bit, parity).
The diagram shows that the message is being transmitted (as it should be), but PuTTY does not show anything. I also used Tera Term - it also does not see anything. The method of scientific "poke" (enumeration of different speeds) did not give anything.
Could the problem be in the cts/rts signals that are present in the project and landed on the ground, but the FlowControl (in PuTTy) is set to none?