Rive as background?

Hi , i would like to put a Rive animation as a background ,
i would like to do it with the rich text editor calling it
with something like this

but its not working

i can put there .svg but at the moment there is not a a way to convert a rive animation
to a .svg

so i tried with a webview but ,correct me if i’m wrong ,
i can’t use a webview as a background

do you have any advice for me?
Thanks for your time