Air Pods Pro ECHO Sound
The call recipient gets eco sound during the call , while is use my airpods pro
Is this only a single caller, or does the problem occur on every call?
Only one or a few callers: The most likely cause would be a problem in the cellular network, echo suppression not working.
If the problem is for every call: If the other party in a call is hearing an echo of their own voice (with a delay) the most likely cause is audio feedback via your phone because your speaker is too loud. In other words, the microphone in your phone is hearing the other party's speech from your phone's speaker, and sending it back to their phone. This is more likely if you are using a speakerphone or hands-free with car speakers but it would be extremely uncommon when using AirPods.
I suggest check the fit of the AirPods Pro in your ears (use the Ear Fit test), and at least for testing turn down the volume on your AirPods.