Hi Tuli Innocente Beukes,
I am Dave, I will help you with this, Community is just a user to use forum.
They have not yet created an Immersive Reader for Edge on mobile devices and there is currently no work from them if they intend to do that.
If you have access to a Winnows PC, open Edge, then press Alt + Shift + i to open the edge Feedback panel and ask there if they intend to do that, they are very responsive to suggestions for the Edge browser.