[jjcon]

Not true - just look at the latest chip from Apple.

https://en.wikipedia.org/wiki/Apple_A13

Yes it uses the arm instruction set, but it was completely designed by Apple. This is identical to Intel using the same 64 bit instruction set as AMD... you wouldn’t say AMD designs intels chips though.

[kergonath]

Apple is largely an exception in the crowd of ARM SoCs manufacturers, though. A lot of companies just implements ARM cores, with their additional magic in other bits of the SoCs. The fact that Apple does it does not mean that ARM does not do any design.