SysRq key on a TLC keyboard

I have a "Logitech G14 TKL SE" keyboard. In this keyboard, the print screen key is emulated with the Fn+Ins keys combination. Unfortunately, I'm not able to get the SysRq magic key functionality. * I enabled it with:

-shell
    sudo sysctl kernel.sysrq=1

* If a do:

-shell
    cat /proc/sys/kernel/sysrq

I get the expect 1 as the result. * If I look at journal with:

-shell
    journalctl -f

I'm expecting to get something like this if the key combination is right:

kernel: sysrq: HELP :

But it doesn't appear. The operating system is Ubuntu 22.04. I tried different combinations with Alt, Alt Gr, Fn and Ins, all without success, just some undesired screen shots. Probably the issue here is with the keyboard. Any suggestions?