As others have said, you don't need to reduce the detail of your story just rework it. Take a look at what your story needs to know right now in act 1 and explain the bare minimum details of what needs to be known for the upcoming chapter.Through character dialogue, character non-verbal interaction and attitudes you can get a lot of info.
Sometimes an ATLA-style info dump at the start can work out, but it needs to be well written, easy to follow and most importantly: hella short. A short paragraph max with at most 1 jargon word (and that word has to be EASILY DEFINABLE within the paragraph), and the visuals if in comic form have to also reflect what is being said in the paragraph. Though it can seem simpler, it's actually a lot harder to make intriguing.

Ok so I'm going to give an example from my work because it's what I know and it's one of the things readers have praised so far.
My story starts with a short 4 page intro to the world (page 1 pictured here), it sets the scene for chapter 1 and gives people the absolute barebones info on what's going on so that the reader can understand the immediate stakes of what happens directly afterwards, i.e. there's a truck giving out water that the MC is going to miss if they don't run now to catch it. It's immediately relevant information so i made the compromise of shortening the intro to get to the action and work out a narration-style intro that shows off the world while the MC finishes work and goes home.
However, cloning is a really important part of my comic. The main character is a genetecist who specialises in cloning, many characters are clones themselves, a huge point of tension in the plot is how the clones are percieved and how they fit into the world. I have an 11 page document on different cloning methods that the MC is intimately familiar with, the history of cloning, the big innovators of the field, the fight for justice in history, the works. They are arguably more important than the setting itself.
The clones are not mentionned explicitly until near the end of chapter 1, 30 pages in. And even then, only a single line of my notes made it in: that the mc has trauma that is used as an excuse for their prejudice that is common enough to be somewhat brushed off, though not entirely socially acceptable.
None of this is stated directly, it's all in subtext. Not always subtle subtext but subtext nonetheless. Other details like how clones are made exactly, life expectancy, human genetic modification laws, clone usage in labor forces, etc... All are important aspects to understand the stakes of where I'm going with this story as well as multiple character arcs, but they will be introduced when they need to be, because dumping what is essentially a lecture on the subject at the start is going to push readers away. I didn't make the story less complicated, I made it more digestible. You can too.
Also important to know: I am not at the second act yet, and I'm 80 pages in. I've got another 5 chapters before i'm there, and I've already been able to build on the barebones explanations I gave in the intro. Just because the second act is coming and you need readers to know these things first, doesn't mean you have to stick it all in the first 10 pages and then once we've done our homework the action can start.