Sounds like this similar case to me:
Those apps are made by a Taiwanese provider, a country the FP4 is also sold in. I suspect it’s the same as with the Orange and Telekom apps that come preloaded but disabled with the stock OS and get activated if you use one of those providers.
No idea if the Taiwanese apps should be in the general FPOS release, you’d have to contactsupport to get that confirmed 
Oh and welcome to the community BTW 