Do both of them become plural when they are complex

Do both of them become plural when they are complex

No, only the latter noodles become plural

What size bowl of nouns do you like?

Noodles makes a bowl of noodles in the plural
A bowl of noodles has many noodles
Of course, when your bowl of noodles is made up of a very long noodle, you can use the singular
When it refers to a particular noodle, it can be singular

Here are some English sentences in the form of subject + predicate + subject + predicate + predicative

First, the second structure should be called the main table
Take a simple example
The predicate verb in the first sentence should be intransitive, such as I laugh, she iscrying
She is ill, the weather is fine