How does Seller register with Grandnode?. I have seen customer registration. But could not find any ways where seller can register or request access to admin side.

Even if the seller registers through customer registration form, how does the admin understand this was a request from seller to get access to the portal?

You can join our partnership program, more details can be found here: https://grandnode.com/partnershipprogram

However, even as a partner, you don't have access to the admin side.

I think, I have confused you with my post.
I just need to know how can a seller gets registered within my eCommerce platform?.

I have seen the feature of customer registartion , Similarly, Is there an option for sellers to register to the multi-vendor system?

Ah, ok. So it's "Apply for vendor account" feature. You can enable it in the settings of the store.

But Patryk, I am not able to locate this feature in settings. Kindly help

Maybe this will help you in locating it: https://docs.grandnode.com/vendor-settings

Then please look in the footer of the store.