how to Split funds from a single charge between different sellers using Stripe Connect

I was able to create stripe payment whereby a seller and the website owner shares amount paid by a buyer for a product online via application_fee. The problem is that when a buy buys multiple product, I find it difficult to transfer funds to multiple sellers after successful transaction with the buyer. For now I am find it difficult to implement the code successfully to implement the task. The code below is python (Flask).

@posts.route('/chkout')
def checkout():
    res = Cart.query.filter_by(username = current_user.u, status='pending').all()
    line = []
    #acc = []           
    for r in res:
        amt = int(r.amount * 100)
        course_img = Post.query.filter_by(id = r.c).first()
        te = {
              'price_data': {
                'currency': 'usd',
                'unit_amount_decimal':  amt,
                'product_data': {
                'name': r.course,
                'images': ['https://www.sssssssss.com/static/stylesheets/course_cover/'+ course_img.course_cover],
                },
              },
                'quantity': 1,
            }
        line.append(te)
        #acc.append(owner_id.connect_accnt_id)
    

    session = stripe.checkout.Session.create(
        payment_method_types=['card'],
        line_items=line,
        payment_intent_data={
           'application_fee_amount': 1,
           'transfer_data': {
              'destination': 'acct_xxxxxxxxxxxxxxxx',
             },
           },
        customer_email='a@b.c',
        mode='payment',
        success_url=url_for('posts.processing', _external=True) + '?session_id={CHECKOUT_SESSION_ID}',
        cancel_url=url_for('posts.viewcart', _external=True),
       )
        
    return jsonify(checkout_session_id=session['id'], checkout_public_key=config.get('STRIPE_PUBLIC_KEY'))

I really appreciate if you assist me