import RandomIcon from '@@mui/icons-material/Random'; // Note: this doesn't exist

​

<Carousel

    NextIcon={<RandomIcon/>}

    PrevIcon={<RandomIcon/>}

    // OR

    NextIcon={<img src="http://random.com/next"/>}

    PrevIcon={<img src="http://random.com/prev"/>}

>

    {...}

</Carousel>