Magento 2 - Configurable product allows linking existing skus in the registry.

Magento 2 - Configurable product allows linking existing skus in the registry. Today the standard magento 2.4.2 does not allow editing a simple product including configurable products with existing skus in the registry. I need to be allowed to include selection, linking existing products in the register using the original sku and bringing the price. The objective is to use the configurable product to present in the product detail the options for colors, voltages, product sizes and as you change these options, the link of the current product changes. Where each product already has a registration price etc, but I can't redo registrations and use other skus as required by magento.