If Flatpkak - it is sandboxed and will not be able to communicate with other essential files on the system.
I recommend using the .deb package instead.
Users can retireve the .deb package with wget using terminal
wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
Which, of course is just the wget command followed by the link to the download page.
You can immediately run the dpkg command in terminal to install it
sudo dpkg -i google-chrome-stable_current_amd64.deb
or double click the freshly downloaded .deb package in your home directory to run the installer.
You can remove the flatpak version with the flatpak uninstall command in terminal.
You can use flatpak list to verify the chrome package name as flatpak recognizes it.