Is it normal to use the present perfect to confirm a statement in the simple past ?
Q : I visited Paris last year.
A : Oh, you have visited Paris ?
Q : She travelled through Eastern Europe.
A : Oh, she has travelled through Eastern Europe ?
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It's all right to respond that way, since it's not a mistake, because your response is grammatically correct. However, as a learner, you might want to pay attention to the nuances there.
"I visited Paris." - This simply puts the emphasis on the verb, visited, may be for the first time, or it might serve as an answer to the question: "What did you last summer?"
"I have visited Paris." - The use of present perfect here means that I have gone to Paris in the past, and may be, more than once. It's a direct answer to "Have you visited Paris?"
That said, it isn't normal to respond to a question the way you've written. Usually, people responding spontaneously, say as follows:
"I visited Paris last year." - Oh, did you?
"I have visited Paris." - Oh, have you?
The same can be applied to your other example.