Create a folder in the macos root directory

 Edit file (doesn't exist by default, but it doesn't matter)

sudo vim /etc/synthetic.conf

Fill in the following

data    /System/Volumes/Data/data

:wq save

===================Instructions======================

data: root directory mapping path

/System/Volumes/Data/data: actual path

===================Instructions======================

 

 Create a folder (modify as needed)

mkdir -pv /System/Volumes/Data/data

Restart