created user can't access ubuntu folder

[wykhuh]

In the groups and user section, Brian shows creating a brian user and trying to add a file to the ubuntu folder. https://btholt.github.io/complete-intro-to-linux-and-the-cli/users-groups-and-permissions#permissions

sudo usermod -aG sudo brian 
su brian
cd /home/ubuntu.

When I follow those steps, the brian user can not cd in the ubuntu. Other users do not have access ubuntu folder.

# in /home directory, ubuntu user

ls -l
drwxr-x--- 14 ubuntu ubuntu 4096 Jul 21 12:00 ubuntu

I have Ubuntu 24.04 LTS installed with Multipass. My assumption is that the permission on the ubuntu folder on Brian's machine is different than Ubuntu 24.