Sophia here from Shopify. While there is not currently a specific date we can provide for when Shopify Payments will be available in Portugal, the store owner email address will be notified when there is news to share. In addition to email alerts for Shopify products expanding to new regions, any updates will be posted here on the Shopify changelog.
I appreciate your interest in using Shopify Payments, and I'll make sure that our developers are aware of the demand in your area. Thank you so much.