The PowerPC name is still around although it's mostly around in the form of the POWER ISA used in systems that run AIX and, I believe OS/400. IBM i used to be a largely distinct product line that grew from older IBM minicomputers but a lot of the hardware is now shared with POWER systems running AIX (and Linux?) I've been largely out of this space for a while so I may have some details wrong.
The PowerPC name is still around although it's mostly around in the form of the POWER ISA used in systems that run AIX and, I believe OS/400. IBM i used to be a largely distinct product line that grew from older IBM minicomputers but a lot of the hardware is now shared with POWER systems running AIX (and Linux?) I've been largely out of this space for a while so I may have some details wrong.
PowerPC has become POWER, and you can get hardware outside of IBM.
https://www.raptorcs.com/
https://openpowerfoundation.org/