If you are already running the iOS 14.5 or newer version on your smartphone, you can change the Siri voice after setting up the app. Here is a step-by-step guide for the same.
Step 1: On your Apple iPhone, open the “Settings” application.
Step 2: In the Settings app, tap on “Siri & Search.”
Step 3: Now, tap on the “Siri Voice” option and then select Siri “Variety” and then choose a Voice from the available options.
Once the voice you selected has been downloaded from Apple’s server, a checkmark will appear next to it.
Do note that the number of Voice options available depends on the Variety that you have selected. The American variety offers four voices while others like Australian, British, Indian, Irish, and South African offers two options.