Apple currently does not offer a dedicated server product, although some companies have taken to running M-series macs as servers for things like xcode build agents (Github, see here) or home servers.
This market resolves yes if at any time before the end of 2026, Apple announces a machine that is
Intended to be used as a server in professional contexts (e.g. a device that merely serves to store media or backups in a home/consumer context would not count)
Running proprietary ARM-based CPUs like their M-series of chips (although this does not hinge on the naming of the chip, so if they launch a series of server chips based on the same underlying approach it would also resolve yes)
Note that this is a hardware question, so server software would not resolve yes.