Open the pre-installed Browser
navigate to an APK Mirror site...APKMirror is good...
Search for the chrome APK and download
Exit the home screen and open the file manager..Locate the APK file you got and install it.
You can also download the APK...
I am at the latest firmware for both devices with the shaking aperture blades:
Mavic 4 Pro is at firmware 01.00.0500
RC Pro 2 is at firmware 01.00.0500