Should I use single-page or multi-step checkout on mobile?

As a Shopify store owner in the fashion industry, mobile checkout has been my Achilles' heel. I've watched countless potential customers abandon their carts mid-purchase, and the frustration is real. My analytics show a massive drop-off rate on mobile—around 70% of mobile shoppers never complete their purchase. I've tried everything: simplifying product pages, optimizing images, but the checkout process remains a stubborn bottleneck. Some days, it feels like I'm losing money with every swipe and tap. I know mobile commerce is growing exponentially, and my current checkout experience is killing my conversion rates. Should I streamline everything into a single page for quick completion, or break it down into digestible steps that feel less overwhelming? Every abandoned cart feels like a personal failure, and I'm desperate to understand the psychology behind mobile purchasing behavior. My team keeps pushing for optimization, but we're divided on the best approach. The stakes are high—improving mobile conversion even by 5% could mean thousands in additional monthly revenue. I need a strategic, data-driven solution that doesn't just guess, but truly understands how mobile shoppers think and behave during the purchase journey.