If you want to set two rows in a slider, then you can try this code in React.
Example
import React from "react";
import {Container} from 'react-bootstrap'
// Import Swiper React components
import { Swiper, SwiperSlide } from "swiper/react";
// Import Swiper styles
import "swiper/swiper.min.css";
import "swiper/components/pagination/pagination.min.css"
// import Swiper core and required modules
import SwiperCore, {Pagination} from 'swiper/core';
// install Swiper modules
SwiperCore.use([Pagination]);
export default function SectionBody() {
return (
<div className="body">
<Container>
<Swiper
slidesPerView={3}
slidesPerColumn={2}
slidesPerColumnFill= {"row"} // important!
spaceBetween={30}
pagination={{
"clickable": true
}}
className="mySwiper">
<SwiperSlide>Slide 1</SwiperSlide>
<SwiperSlide>Slide 2</SwiperSlide>
<SwiperSlide>Slide 3</SwiperSlide>
<SwiperSlide>Slide 4</SwiperSlide>
<SwiperSlide>Slide 5</SwiperSlide>
<SwiperSlide>Slide 6</SwiperSlide>
<SwiperSlide>Slide 7</SwiperSlide>
<SwiperSlide>Slide 8</SwiperSlide>
<SwiperSlide>Slide 9</SwiperSlide>
</Swiper>
</Container>
</div>
)
}