much more 是程度副词 much 的比较级形式，修饰 appeal，说明“吸引的程度更大”。

比较级的演变如下：

1. appeal to the younger audience （无程度状语）

2. appeal much to the younger audience（加程度状语 much）

3. appeal more to the younger audience （把 much 变成比较级 more）

4. appeal much more to the younger audience（在 more 之前再加 much 程度副词修饰more）

Reality TV seems to appeal much more to the younger audience.

【翻译】真人秀电视节目似乎更能吸引年轻观众。