Parallax effect(s) on table/mobile not working/not available (?)

I'm fairly new to the Gridbox ecosystem, so forgive me if I'm asking already answered question: I'm noticing on all available theme, and in my own experiments that the parallax (mouse movement/scroll) will be customizable for desktop but I don't see options (nor in that effect the effect itself) on other viewports -- why? and is there a fix? thanks!!

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