I agree the way to reach split mode and choose which two apps you wanted was easier the previous way.
I'd suggest to go into your Samsung Members App and tap in Get Help to give feedback
Daily Driver > Samsung Galaxy s²² Ultra 256Gb.
Samsung Gear s³ Frontier Watch.
Samsung Galaxy Watch⁴ Classic.
The advice I offer is my own and does not represent Samsung’s position.
I have no affiliation with Samsung.