Private Home Directories Ubuntu
Until now, users on the same Ubuntu system could access and read the files in the home directory of other users. This is changing from Ubuntu 21.04 - adding a layer of security and privacy to Ubuntu systems.

The development of Ubuntu 21.04 is in progress for its stable release on April 22, 2021. One of the proposed changes in Ubuntu 21.04 is to make the users’ home directories private.

I hope you are aware of file permissions. If not, I have written a detailed and easy to understand guide to Linux file permission and I suggest you read that.

Most people probably never noticed it but the home directory in Ubuntu has the permission 755 i.e. rwxr-xr-x.