Microsoft Rewards redemption catalogs, including available gift cards, are region-specific and controlled by Microsoft. The current documentation lists all countries and regions where Microsoft Rewards is available but does not provide a way for customers to add or request specific partners or gift cards (such as Amazon Egypt) directly through configuration.
To suggest adding Amazon Egypt (Amazon.eg) gift cards for the Egypt region, feedback must be submitted through official Microsoft feedback/support channels for Microsoft Rewards. Catalog changes (like adding new merchants) are handled centrally and are not configurable by end users.
Note that Microsoft Rewards availability and offers differ by country/region and can change over time, so any new reward type would appear automatically in the Egypt catalog if Microsoft decides to add it.
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