Transfer paid apps from Android to iOS?

My question would be, if I buy an Apple smartphone, will I be able to transfer my paid apps and in-app purchases from my Android-based Huawei smartphone?

No, because there are different apps in a different app store from a different operator.

First of all, most of the chargeable phones can't be transferred to other mobile phones (are mostly "personalized - depending on the IMEI number) and the operating system must also be the same.