Text-to-Speech seems to ignore SSML input

When submitting JSON files with SSML input, you can use the Prosody tag in the following format[1][2].

Example:


<prosody rate="slow" pitch="-2st">Can you hear me now?</prosody>

[1] https://cloud.google.com/text-to-speech/docs/ssml#prosody

[2] https://www.w3.org/TR/speech-synthesis11/#:~:text=3.2.4%20prosody%20Element