Hello @1824029120,

With the latest Pie release V10.3.1.0.PEIMIXM, you cannot use Hotpot along with WIFI. If you want to use this feature, then you have to rollback to the last version ROM i.e. V10.3.1.0.OEIMIXM (after unlocking the device bootloader, so that you don't brick your phone)

Not sure, why Xiaomi has designed (modified the Pie OS) that way; since devices built by other companies like Samsung still has the parallel wifi-hostpot feature available with Android Pie version.