Activate night light on Ubuntu

[lenny54linux]

New user here.

I'm trying to get "Night Light" installed.
~ Linux Mint 20.2 Cinnamon

I installed GNOME,
GNOME and KDE, two major desktop environments, have added the night light feature in the settings.)
A GNOME extension to manage the built-in night light temperature


However, I can't figure out how to install the extension.
Note: I can't use "Redshift" for VPN reasons

I still do not have the night light option in the settings.

Any help would be appreciated.
Thank you.

[slickymaster]

Thread moved to MINT.