Every company has different problems that employees experience. Making CPUs is inherently less political than web search and ad tech, and so I suspect there's less interest in social justice type protests at Intel than at Google, and maybe more economic concerns or general work environment concerns.
I think there are also a lot of industry common practices that ought to changee but may require not just individual unions at different companies but unions in multiple companies working together.
Examples include: onerous intellectual property agreements, excessive executive compensation tied to short-term stock gains, anti-compete clauses, severance packages with anti-disparagement clauses, and whole-day uncompensated interviews.
There are also rights that I think should be commonplace in the tech industry: certain minimum working conditions, like a minimum cubicle size, high cube walls if you prefer them, and multiple monitors of a reasonable size and resolution, the right to refuse work if documentation required to do one's job correctly is unintelligible or nonexistent, the right to have any question raised by ten or more employees be addressed in a timely fashion by senior management (even if the legitimate answer sometimes is "that's a secret, we can't tell you for strategic or legal reasons"), the right to have your name and contributions to the company listed publicly if you want, the right to (in cases where it doesn't directly undermine the company's ability to collect revenue) publish one's work with an open source license, and so on.
Anyone working in the tech industry could come up with their own list that would be different, but maybe there's enough overlap to make collective action workable.