Nokia is a proponent of OpenRAN and associated technologies, which are open, vendor-agnostic standards for phone networks backend kit as opposed to the very, very proprietary systems of yore; I'd say on the basis that it should be easier to tell if an OpenRAN box is leaky. Obviously that requires vigilance on the part of the operator so, yeah, fuck knows, but it's harder for OpenRAN kit to lie.

As an aside, most countries have Lawful Intercept laws. Part of these laws require that the network kit has a standard physical port that gives full, unrestricted and - scarily - unlogged access to everything they handle for use by your government's intelligence agencies.