Shopify is comprehensive, but to integrate it with Webflow, you are are looking at updating products in both platforms.
This thread is full of suggestions:
For me - @foxy gets my vote - you manage your design and your products in one place - Webflow - rather than two places. The support they offer regardless of your previous knowledge is genuinely incredible. Let them know your project needs at the start and they will let you know any limitations. At present inventory control is the only thing i’m missing - Foxy have created the functionality, just needs a way for Webflow to integrate it securely.
Hope that helps
Stu