There are many store sync apps available,
but none that also integrate into shipping-pickup afaik.
So you may need to also use an app like atomyard’s local-delivery app https://apps.shopify.com/local-delivery-1
What you want to avoid is doubling inventory of products you do not want to continue selling when out of stock.
Because otherwise if you make “Nro 2” a native admin location with inventory for pickup purposes your no longer sharing inventory but doubling it.
So you may either need something custom for both stores connecting the backend and a theme customization for “Nro 1” to display a non-native pickup option.
There’s also using automation apps like usemechanic to craft your own data sync logic
https://tasks.mechanic.dev/?q=sync
Merchatns that need to do discovery and development for this type of logistics can contact me with details for project pricing.