BTP Launchpad service has no support for onebyhalf Tiles

Hi,

we are using BTP Launchpad Service (now SAP Build Work Zone, standard edition). We developed custom tiles, based on GenericTile, that are using the OneByHalf size.

The problem ist that the Launchpad Service renders them incorrectly (the container is 1x1 and the tiles are overlapping each other).

I also noticed that the values for "sap.flp" is either 1x1 or 1x2.

How can I use custom tiles with custom sizes in the Launchpad BTP Service ? If I look in the guidelines here https://experience.sap.com/fiori-design-web/launchpad/ there you can see half-size tiles are there but how can this be set in the btp service ?