Collections of her compositions have been published by Boosey & Hawkes and are featured regularly in the ABRSM, Royal Irish Academy of Music and other exam syllabi.

[8] Her debut solo album It’s a Cello Thing was named CD of the Week on Ireland's national classical music station RTÉ Lyric FM.

[10] In 2021, McDonagh released the complete Beethoven cello and piano sonatas with John O'Conor on the Steinway & Sons label.

[12][13][14] McDonagh released her album Bach: Complete Solo Cello Suites in 2024 on the Steinway & Sons label.

Reviewer Simon Corely from Concerto Net writing about the recording says that "McDonagh convinces with her clear articulation, her drive and vigour, and her very meticulous phrasing.

In a very clear recording, she progresses in a firm and resolute manner to the truth and solidity of the discourse, without the interpreter's, or the composer's, ego becoming excessively prominent.

IntoClassical commenting on the new composition noted "McDonagh’s work is the real interest here: taking each season in one movement, the composer weaves together Irish melodies and Glass-like repetition to stirring effect.