Brightness control bar on XFCE

Where is the brightness control bar on XFCE? The EOS is running on a desktop computer. Interestingly, LXQT desktop environment has a brightness adjustment bar. Am I just lame, or is this really missing in Xfce? Google search results:brightness control bar

I have a laptop. On mine, the power manager plugin acts as a brightness control. I can click on it to get a slider or scroll my mouse wheel over the indicator on the bar to change the brightness. I’m not sure if that helps you at all. I also use the keys on my keyboard to adjust it.

I also have this setting on my laptop, but not on my desktop computer.