Using Content Directory Convention vs Using Page File Convention

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Using Content Directory Convention is OK，
Using Page File Convention report：
Module not found: Can't resolve 'next-mdx-import-source-file'
1 | "use no memo";
2 | import { jsx } from "react/jsx-runtime";

3 | import { useMDXComponents as getMDXComponents } from "next-mdx-import-source-file";