Welcome to Shopify Community. My name is Olivia and I work here.
Thanks for sharing your question. Bundling products and offering joint discounts is an awesome way to engage your customers and increase your AOV (average order value). There's a few different ways to accomplish this on Shopify through the use of an app, so I have pulled up some top contenders for you. Check them out below:
Make sure you check these out to see which one might work best for you. Remember, you can test each of them out before deciding and figure out which one fits your needs. For my personal store, I like an app like Frequently Bought Together, but even I check out customer testimonials and reviews before installing any app on my store.
If any questions come up about the apps, remember you can reach out to the app devs. If there's anything further I can help answer, let me know and I'd love to chat more.