Correct, ARM does not dominate x86 in desktop and servers. Just everywhere else.
Apple is top 5 for laptop and desktop market share. So, pretty sure Apple RISC Silicon has a presence in those markets. Very recently, Qualcomm has entered as well. And of course Chromebooks are primarily ARM.
ARM has only recently entered the server market. Already it is having some success, especially with hyperscalers.
RISC-V is about to enter all those markets. I mean, RISC-V silicon is in use in the cloud. But it is still an experiment at this stage. And you can buy a RISC-V laptop. But they are only for devs.
Apple business is vertical integration, they have zero presence in the chip market.