Unable to use the XLookup function in Excel for office 2021

Hi I purchased and installed office 2021 for the XLOOKUP function.

https://support.microsoft.com/en-us/office/what-s-new-in-excel-2021-for-windows-f953fe71-8f85-4423-bef9-8a195c7a1100

https://support.microsoft.com/en-us/office/xlookup-function-b7fd680e-6d10-43e6-84f9-88eae8bf5929

It does not come up when I try to type in the function. Office 365 is installed, but the license is under office 2021.