How do you set up the visible tiles for a specific user in SAP Fiori...

 The visible tiles for a specific user in SAP Fiori Launchpad are determined by the PFCG roles that are assigned to the user. The PFCG roles contain the SAP Fiori catalogs and tile groups that define the available and visible tiles for the user.

The steps to set up the visible tiles for a specific user are:

Create or use an existing PFCG role in the backend system that contains the SAP Fiori catalogs and tile groups that are relevant for the user. The catalogs and tile groups can be created or copied from the SAP Fiori Launchpad Designer app. The catalogs contain the tiles and target mappings that represent the apps that can be launched from the launchpad. The tile groups are collections of tiles that are displayed on the launchpad home page.

Assign the PFCG role to the user in the backend system. The user can have multiple PFCG roles assigned, depending on their business needs and authorizations.

Log on to the SAP Fiori Launchpad with the user credentials. The user will see the tiles that are assigned to them through the PFCG roles on the launchpad home page. The user can also personalize the launchpad by adding, removing, or rearranging the tiles and groups.

The other options are incorrect because:

Portal roles are not used to assign SAP Fiori catalogs and tile groups. Portal roles are used to assign portal content, such as iViews and pages, to users in the SAP Enterprise Portal.

Assigning the tiles directly to the user is not possible. The tiles are part of the catalogs and tile groups that are assigned to the user through the PFCG roles.

References:

Setting Up Launchpad Content | SAP Help Portal

Creating and Configuring Tiles | SAP Help Portal

SAP Fiori Launchpad Tiles Setup - Go Coding

How to create Fiori Catalog, Group and custom Fiori tiles