Flick Carousel ARIA-HIDDEN observer

flick_aria_patch.js

class FlickPatch {  //  Flick Carousel ARIA-HIDDEN observer
    constructor(_d, _sQ) {
        this._d = _d; this._sQ = _sQ;
        this.aF = []; this.aObs = [];
    }
    init() {  //
        this.aF = Array.from( this._d.querySelectorAll( this._sQ ))
        if( this.aF.length ){
            this.aObs = []
            this.aF.forEach( ( eF )=>{
                const oObs = new MutationObserver( flickPatch.removeAttr );
                oObs.observe( eF, { attributes: true, childList: true, subtree: true } );
                this.aObs.push( oObs )
            })            
        }
        return this;
    }
    removeAttr( aObs ){  //
        if( aObs.length ){
            aObs.forEach( ( elO )=>{
                if( elO?.target ){
                    [ ... elO.target.querySelectorAll( "[aria-hidden='true']" )].forEach( ( eH )=>{
                        eH.removeAttribute("aria-hidden")
                    })
                }
            })
        }
    }
}
//. Usage
let flickPatch = {}
document.addEventListener("DOMContentLoaded", ( ev )=>{
    setTimeout( ()=>{
        flickPatch = new FlickPatch( document, ".flickity-slider" )
        flickPatch.init()   
    }, 8e3 )
})

You're right. Ironically, by employing this technique to attain a 100 accessibility score in Lighthouse, it becomes less accessible. I had hoped for reduced scripting. Thanks for taking the time to review my approach and provide feedback; I'll incorporate neodigm's method with your modifications.