Arm Holdings neither manufactures nor sells CPU devices based on its own designs, but rather licenses the processor architecture to interested parties.
ARM offers a variety of licensing terms, varying in cost and deliverables.
Integrated device manufacturers (IDM) receive the ARM Processor IP as synthesizable RTL (written in Verilog).
This allows the manufacturer to achieve custom design goals, such as higher clock speed, very low power consumption, instruction set extensions, optimizations for size, debug support, etc.
To determine which components have been included in an ARM IC chip, consult the manufacturer datasheet and related documentation.