Shopify REST Admin API - fetch orders by line_items[0].title = something

[haze0_o]

For context, I am requesting via node-fetch the Shopify Admin REST API orders.json with the queries shown in my code. For some reason, this only returns the latest order regardless of if I add status=any or limit=250 (which is the standard limit for orders). Before I go too much into detail let me show my code so you can understand the query.

const User = require('../models/User.model');
const fetch = (...args) => import('node-fetch').then(({default: fetch}) => fetch(...args));

const getReportsPartner = async (req, res, next) => {
    const user = await User.findById(req.user.id)
    const url = 'https://astore.com/admin/orders.json?fields=total_price_usd,line_items';
    const headers = {
        'X-Shopify-Access-Token': 'anaccesstoken',
        'Content-type': 'application/json',
        'Authorization': 'anauthkey'
    }

    fetch(url, { method: 'GET', headers: headers })
        .then(res => res.json())
        .then(json => {
            const orders = json.orders[0]
            console.log(orders)
            const partner = orders.line_items[0].title
            const commission = (orders.total_price_usd * .125).toFixed(2)
            res.render('reports/partnerReport', { partner: partner, commission: commission })
        })
}

module.exports = { getReportsPartner }

https://astore.com/admin/orders.json?fields=total_price_usd,line_items.title=something 
https://astore.com/admin/orders.json?fields=total_price_usd,line_items&line_items.title=something

I have also tried line_items[0].title=something in the url as well, however this seems to invalidate the entire request. I appreciate any help you can give. If you need more in terms of context let me know. Ultimately I plan to get recent orders by title and graph the orders and commissions in a report format. For future orders I will be using a webhook, so at the moment I am only worried about past.