Are you still getting used to the 6 GHz channel numbers, PSC, and centre frequencies?
The wifichannel tool is there to do the conversion between channel number and center frequency for you.
It also lists all 2.4 GHz, 5 GHz and 6 GHz channels, indicates U-NII bands, and more.
Here are few practical examples of what it can do for you.
How to install
Follow my installation instructions here and get wifichannel from my GitHub.