Hi ,
Fiori apps implementation for transactional , Analytical and fact sheets in S4 also follows the traditional implementation approach .
New app types for web dynpro apps and few bi analytical apps are added to the list in SFIN , S4 products but the implementation is again straight forward when followed with a strategic approach.
Nevertheless majority of the guides related to S4 are available at SAP S/4HANA, on-premise edition – SAP Help Portal Page and fiori apps implementation guide is UI Technology Guide available here .
Regards
Virinchy