This can be done by Product Bundles app, you can set up a specific products bundle discount (in percent or fixed amount) or bundles from each collection.
Check out these apps:
- Product Bundles by Bold
- Vitals 40+ apps with Product Bundle feature
- Product bundles by Picky Story
I recommend checking out this review the best Upsell, cross-sell app guide as well, there would be more apps with more features, it helps you to understand how they work, and to choose the right plug-in to your business scale.
I hope you find this helpful.