then/that these noodles later became pasta.

[keannu]

Doesn't "then" also work in the underlined? The answer is only "that", which I doubt.

L2-40p)However, it is commonly believed that noodles originated from China because the earliest record about noodles were found in a book written during the Han Dynasty of China (206 B.C.-220 A.D.). It is also believedthat Marco Polo brought noodles from China to his home country, Italy, in the late 13th century and then/that these noodles later became pasta.

 

[Gillnetter]

Doesn't "then" also work in the underlined? The answer is only "that", which I doubt.

L2-40p)However, it is commonly believed that noodles originated from China because the earliest record about noodles were found in a book written during the Han Dynasty of China (206 B.C.-220 A.D.). It is also believedthat Marco Polo brought noodles from China to his home country, Italy, in the late 13th century and then/that these noodles later became pasta.

It could be written with "then" but the meaning would change. Using "that" here means that it was a fact that the noodles later became pasta. Using "then" means that noodles became pasta over a period of time. There is a subtle difference between the two.

 

[Raymott]

Doesn't "then" also work in the underlined? The answer is only "that", which I doubt.

L2-40p)However, it is commonly believed that noodles originated from China because the earliest record about noodles were found in a book written during the Han Dynasty of China (206 B.C.-220 A.D.). It is also believedthat Marco Polo brought noodles from China to his home country, Italy, in the late 13th century and then/that these noodles later became pasta.

I don't believe 'then' is right, because we already have 'later' as a temporal adverb. You want to say, "Then the noodles later became pasta"?
The sentence structure is "It is believed that A and that B". where "that B" is "that these noodles later became pasta".