An Oppo or LibrePhone might be a peer substitute to an iPhone a neckbeard on HN, but an Apple iPhone is still a luxury good.
Sell goods with a strong brand cache and they will continue to sell like hotcakes.
You will be skewered for using a knockoff.
Conversely, this is why Temu and Shien do well - why should I spend $20 at Uniqlo or $40 at GAP on fast fashion when I can spend $10 for the exact same thing on those Apps. It comes from the same factories in China and Vietnam anyhow