Unable to customize keyboard shortcuts in excel 365

You’re right, I didn’t realise that the article I was referring to was talking about Word, I assumed it was about Excel as my search was for Excel.

Anyways, any advice how to check the list of the assigned keyboard shortcuts in my Excel programme? The thing is, there is a universal keyboard shortcut that does not work with me whenever I try it, which is: Ctrl + ; which is there to hardcode today’s date, whereas this one works: Ctrl + Shift + ; which is there to hardcode the time now, I haven’t changed anything in my setting and I cannot figure out why it doesn’t work, so I thought to check the list of the assigned keyboard shortcuts to find out what this combination, Ctrl + ; is assigned for in my version.