Change alternatives for autofill

Hi

Maybe a stupid Q but ask anyway. We have a shared excel dokument that we use. When I use Excel on the computer I can change alternatives for autofill but not on the webversion.

I use autofill to copy the text but when I want to use it for adding numbers it doesn't work because there is no option to change between copy, fill and so on.

I find this very annoying and wonder if someone could advice me? 

Thanks/sollan