Automate Product Photo Import from AWS Bucket?

I have several Shopify stores which all sell the same products to different markets (for example, one is a multi-brand retail store, while another exclusively sells a private label brand we own). We use SAP to manage inventory/fulfillment, and have an AWS bucket where we upload all our product photos. Currently, our process involves scraping image URLs from our AWS bucket and adding the URLs to CSVs for to be imported into each Shopify store. This means a lot of repetitive work to keep images synced across all stores.

Our images are named by SKU in sequence (123456.png, 123456_1.png, 123456_2.png, etc.). Does anyone know of a way to make product image management more seamless between AWS and Shopify? In a perfect world, we’d upload images to AWS, and they’d get automatically pushed to Shopify, updating existing products (or populating new products) with the relevant images based on SKU.