This is Kool outside of building new fabs and the chips act education is a huge part of innovation all this investment into semiconductors hope there on track with education to for all those nice new fabs. In alot of big cities Spanish is a requirment in the introduction (class you have to take to start college) iv always thought rather than teaching a second language maybe computer programming or somthing to that affect should be required as it prolly is in china
If you layout your own chip, it would be extremely difficult for a third-party to insert functionality without causing silicon results to have multiple inexplicable divergences from post-place-and-route simulation results. To put in a backdoor after-the-fact, the "attacker" would need to reverse-engineer your design to find out where and how to insert it.
If an "open foundry" was going to put backdoors in, it would have to be integrated into IP-cores (ex.: XPU cores, USB, PCIe, Ethernet, memory, etc.controllers) you put in your design, then the foundry only needs to worry about having at least one way (ex.: Ethernet, USB, PCIe) to access its IPcore-to-IPcore network and installed backdoors.