Well you absolutely know wrong lmao the Alphabet Workers Union is not recognized by NLRB, and Amazon’s Workers Union is. Apple also has some unionization, as do several video game developers and support companies.
Google has said they support them unionizing because they think it will not affect them at all. Maybe go look into the handful of people who have attempted to formally unionize at Google and see how they have all been fired. Then try and tell me Google supports unionization.