Altgr problem for Mac Turkish keyboard

I use UTM on my M1 MacBook for using ubuntu and I use also sudo dpkg-reconfigure keyboard-configuration and I chose altgr for right control however it doesn't work. I chose MacBook(intl.)+Turkish+right control+ and no special key for multi key. How can I type (for example # or @) in linux

Know someone who can answer? Share a link to this question via email, Twitter, or Facebook.