From what I'm hearing, the argument you're making is that regardless of explicit policy goals, (1) and (2) implicitly further an agenda which has a similar end result to trickle-down economics, that being the "predictably and observably upwards re-distributive."
Now (1) and (2) as you mentioned, are broadly associated with the economic right in America. The usual narrative is that Republicans want to do (1) and (2) to concentrate more wealth among the rich, their reason for doing this being the trickle-down economics creed. There's two main problems with this narrative I see.
The first, is that (1) and (2) aren't strictly right or left. They can be bipartisan. The left--broadly associated with increased taxes on the rich, labor rights, and a bigger welfare state--despite its reputation, often engages with parts of (1) and (2). This is because (1) and (2) aren't strictly set. You can have parts of (1), or parts of (2), or mix-and-match, but presenting them as definitively joined is unfair.
Take the Inflation Reduction act from the Biden era, passed during a blue Congress. It invested heavily in renewable technologies--typically a left-wing endeavor--but wouldn't things like EV tax credits technically be considered corporate freebies, i.e. a bit of (1)? Or Trump's Working Families Tax Cut (the BBB), which although cut taxes for the rich, did genuinely expand the child tax credit and double the standard deduction--the opposite of (2). The point being that there's nuance in how you execute these policies.
The second problem I see with this narrative, is that policy goals are not the same thing as policy results. If legislation endeavors to solve a problem, but fails, it would be unfair to say that the legislation's purpose was to fail. While one could make the claim that (1) and (2) promote an upward redistributive, I don't think you can make the case that either the left or the right specifically aim for that.
This comes back to my central problem in this thread: trickle-down economics isn't a real policy. If you take purported aim of this caricature policy--taking money from the poor and indiscriminately giving it to the rich--nobody is seriously advocating for that. While you might think that that is what's broadly happening within the economy today, it's unfair to blame amalgamations of (1) and (2) policy and say that advocates of supply-side economics _want_ further inequality.