The concept of an infinite multiverse can be a bit tricky to grasp, so let's break it down. In the context of the "Rick and Morty" animated series, the idea is that there are infinite parallel universes or dimensions, each with its own version of Rick, Morty, and other characters.
While the multiverse is infinite, it doesn't necessarily mean that every conceivable possibility is realized within it. Infinite possibilities don't guarantee that every single variation or iteration exists. Think of it this way: between the numbers 1 and 2, there are an infinite number of decimals (e.g., 1.1, 1.11, 1.111, etc.), but none of them will ever reach the number 3.
In the "Rick and Morty" multiverse, there might be infinite Ricks, but it doesn't mean that every conceivable Rick variation exists. The show often explores different dimensions, each with its own unique features, but not every conceivable variation of Rick can be explored or depicted.
It's important to remember that "Rick and Morty" is a work of fiction, and the concept of the multiverse portrayed in the show is a fictional construct designed to provide a backdrop for storytelling. The intricacies and limitations of the multiverse concept within the show are ultimately defined by the creators and writers.