Calc DateAdd function missing

I simply cannot find the DateAdd function in Calc under LibreOffice Version: 6.4.7.2 (Linux Mint 20.1 version 4.8.6). I’ve tried using the Extension Manager but no luck.
Has the function been retired?

And what should such a function calculate?

Perhaps you looking for the EDATE() function?

I was searching based on what I had seen here- DateAdd Function

And that, as the sbasic in the URL indicates, is a BASIC function, the list in the right Content bar as well. The Sub example_dateadd at the bottom also.

The newer 7.2 help has better indicators like the fully typed syntax and the BASIC context in the left bar.

It is, and never was a CALC-function … but if you play with BASIC you will find it!

DATEADD

It’s not necessary. Just add an amount of days to a date, or subtract two dates.
=TODAY()+42
=TODAY()-DATE(2021;1;1)