User is not in the sudoers file. This incident will be reported.

Hello,
I use RHEL 8.9 update today.
I joined my Active Directory domain animals.internal with realm join.
I permitted users of group koalas@animals.internal to log on through SSH.

Then the user pete (member of koalas) is able to log on on RHEL server.

I created a file called /etc/sudoers.d/animals.internal with the following text:

%koalas@animals.internal ALL=(ALL) NOPASSWD:ALL

But when pete runs "sudo su -", he gets
pete@animals.internal is not in the sudoers file. This incident will be reported.

I checked the syntax and it's ok.

visudo -c /etc/sudoers.d/animals.internal
/etc/sudoers.d/animals.internal: parsed OK

If I move the line %koalas@animals.internal ALL=(ALL) NOPASSWD:ALl on /etc/sudoers file, it works.

/etc/sudoers last line is
#includerdir /etc/sudoers.d/

The command ls -la /etc/sudoers.d/animals.internal
returns -r--r-----
Selinux is disabled.

What did I do wrong?

Sudo version is 1.9.5p2