urlToCart.js

const url = "https://raiadrogasil.myvtex.com/checkout/cart/add/?sku=70288&qty=1&seller=1&sc=1?sku=12345&qty=1&seller=1&sc=1?sku=10253&qty=1&seller=1&sc=1"
let items = []
const parameters = url.match(/\A?sku=[^&]+&\A?qty=[^&]+&*\A?seller=[^&]+&*/g)
console.log(parameters)

simulation = parameters.map(value => {
    let obj = {
        "id": value.match(/([\d]+)/g)[0],
        "quantity": value.match(/([\d]+)/g)[1],
        "seller": "1"
    }

    return obj
})

console.log(JSON.stringify(simulation))