How do I show products that link out to another retailer?

Open Affiliate Listings under Store & Donations and click Add listing. Give it a title, photos, the retailer's name, the retailer's link, and the price as the retailer shows it, then set it to Active. Affiliate listings show with or without a Stripe connection, because the card opens the retailer in a new tab and never goes through your cart. Only your own products need Stripe.

To put them on a page, add or edit a Store Products Grid block and set its Source to Affiliate listings or Both. Group listings with collections (made under Store Settings, Affiliate Collections) and the block can show one collection at a time. Every card says Sold by and the retailer's name, and any page that shows one carries a short affiliate disclosure line. Available From and Available Until hide a listing outside a window, so a seasonal pick drops off on its own.

Amazon links carry your own Amazon Associates tag from Product Affiliate Ads, added when the page renders. The link you pasted is stored as is, so any tracking the retailer added stays on it. Links to other retailers are never changed.