Hi @techticpooja ! At the moment, the ability to unpublish products from certain sales channels is limited to apps installed on Plus stores through the publishableUnpublish mutation in GraphQL. One way you could work around this though is by setting ProductStatus to “draft” when running a ProductUpdate mutation.
This would set the product to a draft status and remove it from being visible on sales channels, but for the moment you can’t deselect specific sales channels on non-Plus stores. Hope this helps!