Just insert your Sim into other 5g mobile inwhich 5g welcome offer already running and reinsert it after 10 minutes into your s23 fe. 5g network will work with jio

I have also faced above problem but when I inserted my Sim in other 5 g mobile like iPhone and getted welcome offer and then reinserted simin s23 fe. 5g worked for me and offer activated but jio care still says my phone is not true 5g. But working 5g...