All networking gear and computing systems used for sensitive purposes need to be produced locally by each country. Or if they are going to be developed together then they need to be based on common open source components that are very well audited. That's the only sane approach to all of this. It's obvious that computing systems and networks can be used to steal data from and spy on all sorts of commercial and non-commercial matters and that matters a lot in negotiations between even friendly countries.
What all of these countries should be doing is organizing these sorts of open source frameworks for developing future tech because it's obvious that it can be done that way and that individual countries are incapable of producing these goods on their own in various corrupt authoritarian sorts of governments.
Except self-sufficiency in critical industries like food and fuel ARE prime examples of things that any sane country fights tooth and nail for even today. The US has been pushing for increased rice exports to South Korea and Japan for decades now, but they've always pushed back successfully with the argument that protecting their agricultural industry is a matter of national security. This is from two countries that literally depend on the US for their military defense, and are among the closest allies the US could ever hope to have.
All US services/closed systems present a national security threat to sovereign states.