Win 11 doesn't currently appear to have anything analogous to Win 10's Start Menu tile groups.
I don't use live tiles, but I do use Win 10's tile groups extensively. My PC "wears a lot of hats" since it's used for work (electronic schematic / PCB CAD, FPGA firmware, utilities), photography, music recording, and gaming. All the program shortcuts for the above are nicely grouped tiles in the Start Menu.