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Can't find the conditional visibility area

I have a navigation design as show in the screenshot below.

So, I have my name&surname written in a link block on desktop and I would like it to change to the abbreviation in the mobile view. I wanted to create two different link blocks and change the visibility of them according to the platforms but it is unabled right now.
Screen Shot 2020-09-26 at 5.19.24 PM

And I can’t seem to find the conditional visibility area as shown in this tutorial.
This is the tutorial:
This is what I see on the left settings panel :

Any other ideas about how I could achieve the design I wanted?

Here is my site Read-Only:

Hi @Kubra_Saygin,

Conditional visibility is applicable only on Dynamic content.

It should be explicitly stated on that tutorial video :confused: