The sentence is poorly worded because the term "citation styles" usually refers to different standards for citing (giving credit to) someone else's work. For example, https://pitt.libguides.com/citationhelp provides recommendations for which "citation style" to choose for a given situation.
However, in the example you cite above, your guess is correct. It is using "citation styles" to mean everything after "such as".
Here is how I analyze the sentence.
The subject is a feature of the app: It lets you copy "a text". ("a text" in this context is also not correct USA-based English.) The feature allows for copying plain (unformatted) text, or formatted text (everything following "such as").
From the context, "style" is referring to allowed text formats - as you suggested. The action involves citing. That much makes sense. The problem is that "citation style" has a specific meaning as described by the link above.
This is a case where the documentation could be improved to make the meaning more clear. But it's also a typical problem for English-language writing!