Thank you for your question. Jira Align and Jira Portfolio serve different purposes within the Jira product suite.
Jira Align is a strategic execution platform that helps you connect your strategy to delivery. It provides a centralized view of initiatives, programs, and portfolios, and helps you track and predict delivery outcomes.
Jira Portfolio is a tool that helps you plan, optimize, and execute your projects by enabling you to map out your strategy, create plans and roadmaps, and track progress at a portfolio level.
To learn more about the difference between these two products, please see this article: