Tech was predominantly white (as was the US) in the 70s, by the 90s Asians and Indians were over represented.
I'll submit this is prima facie evidence that tech was (and is to some degree) highly meritocratic, and more so than any other large portion of the economy.
IF they were doing this they're not going to explicitly tell you they are because it's a massive lawsuit waiting to happen.
What they are doing though is putting in laws, regulations, and culture pressure that incentivize them not to hire white males, or at least hire less of them. That's objectively true.
And you never will because it would be insane for any employer to make an admission that they discriminated against you. For one thing they’d have nothing to gain by telling you that, and, if they did tell it would make for an open and shut discrimination lawsuit.
Your account was created somewhat recently, so I'm going to guess you're a young person and you're trying to keep a bright, optimistic attitude towards life :)
That's a good thing, but you should know there's all kinds of discrimination out there, and anyone, of any race, can be a victim.