Q. In APA, how is the in-text citation formatted when referencing an article with no author?

Using APA 7th edition:

• To format an in text citation for a paraphrase use:

(Title, year)

e.g. 
An article: ("Get on Board," 2012) 
A book: (Introduction to Food Science, 2018)

• To format an in text citation for direct quote, use:

(Title, year, p. number)

e.g.
An article: ("Get on Board," 2012, p. A14)
A book: (Introduction to Food Science, 2018, p. 25)

If the title of the work is italicized in the final reference you will also italicize it in your in-text citation. If the title is not italicized in the final reference then you'll put the title in quotes. Titles in an in-text citation should be written in title case.

Note that you would not add the author as Anonymous unless it is specifically indicated. Please see When Information is Missing for more details.