I doubt those measures will be reversed.
Biden might expand the number of H-1B visas awarded sure and that is a separate issue that we could talk about, but it seems clear that Democrats are not supportive of worker exploitation.
Just a heads up the H-1B and other visas are not "illegal" immigration.
Big Tech will demand cheap labor as payback for their censorship and deplatforming of conservative authors and communities.
H-1B visas don't change the voting landscape AT ALL as in absolutely no impact at all. Visa holders can't vote.
Additionally, Hispanics do not represent the demographics of the typical "big tech" / consulting hire. They are statistically going to be East Asian/Asian with a smattering of Canadian thrown in for good measure.
I'm sure at this point nothing will convince you of that though as you seem consumed by your conspiracy theory.