Is -webkit-text-fill-color available?

I'm trying to have a text (404) with a gradient.

It's working with the following code:

background: linear-gradient(to right, #ff0000, #00ff00); /* Valeur par défaut */
-webkit-background-clip: text;
-webkit-text-fill-color: transparent;

When I check on the Chrome console, I can add -webkit-text-fill-color and the clip color is working.

But I don't know how to add the transparent value with the -webkit-text-fill-colorwith this property. I tried in the Advanced Panel but it's not available.

Did I miss something ?

(yes I could add it in an HTML embed but I would prefer to add it directly with the builder - easier to maintain)

Thanks