A few of my students are heavily dyslexic
In Polish 'dysleksja' is used in a very general way and might be better translated as 'learning disorder(s)' in English
In English dyslexia is a very specific processing problem restricted to visual input. Namely the dyslexic person's brain has trouble processing written language. They often can't distinguish d and b or if they see a stop sign they might see STPO or SOTP.
Almost all children go through a phase where they have trouble processing left/right distinctions in writing and in keeping the order or letters consistent. Almost all eventually get through this stage but an unhappy minority gets stuck and the condition remains.
There are other learning disorders as well involving audio input or motor control or sensory control.
In theory in the US allowances are made to help learning disordered children get through school (and there is therapy available for some, unhappily not all, types of learning disorders). In reality it largely depends on how wealthy the school district is (funding for schools is very local).
Also, since public education is being dismantled lots of disordered children are just out of luck. Hundreds of thousands of children disappeared from schools in 2020 and they still haven't been found and nobody seems interested in finding them or getting them back in school.