No, there is no pre-installed Google camera on Xiaomi Poco M3 Pro 5G. The Xiaomi Poco M3 Pro has only a stock camera app like all other so many models of Xiaomi Poco.
Xiaomi Poco M3 Pro 5G Doesn’t have Google Pre-Installed Google camera
The Xiaomi Poco M3 Pro 5G has excellent stock camera features that make the phone incredible on the mid-range entry-level budget phone. But, there is no pre-installed google camera app on the phone. But, if anybody wants to get a Google camera on the phone, just download and install the Google camera app from Google Playstore and simply enjoy the features of google camera.