Je voudrais une pizza(sentence from one of the tests)

Question

Why in this sentence for pizza is not used partitive article de la (some pizza). Thanks

Accepted Answer

‘Pizza’ is a noun that can be countable as well as non-countable. In the sentence ‘ je voudrais une pizza ‘, he isn’t referring to ‘some’ pizza , he is referring to  ‘ a (one) pizza ‘, but not specifying a particular pizza.
French uses ‘ un/une ‘ as indefinite articles -  and as we use ‘ a/an ‘ in English
https://progress.lawlessfrench.com/my-languages/french/view/2

Answer

Je voudrais une pizza -- I would like one pizzaJe voudrais de la pizza -- I would like some pizza