Modifying Shipping Options (Rates, Description, etc)?

[ccrvlh]

Hey all. I couldn't find in the documentation any reference to the possibility of giving the customers different shipping options (with different shipping rates) that would directly affect the total order price. Is this the right resource to use? Thanks.

I've found a couple of comments that mentioned that this is only relevant for the so called "sales channels", which I understand would be something like a marketplace, Instagram, Facebook etc. Is this right? I'm asking since, the only place I've found something related to modifying the shipping options and price on realtime during checkout was on the Storefront API (well also CarrierService, but that doesn't work because of the restrictions of plans, extra packages and so on), so I was guessing I would be able do develop my shipping rate calculator app with the Storefront API. Any ideas on this regard? Thanks a lot.