Genuine and effective employment

Hello clever people inside my computer,

I’m currently working with a Romanian with PSS. She applied for Universal Credit in April and was rejected on HRT grounds. She’s requested an MR and the decision was upheld. The decision notice states:

“Departmental evidence shows that your employment with [...] started on 10 February 2023 and you earned £2684.00. You told us that you last worked on 27 March 2023. From the evidence available and given the short duration of this employment, I am not satisfied your employment can be
considered “genuine and effective” and, as such, you do not have a right to
reside as a retained worker.”

She only stopped working as she was unable to get childcare for her four children, who are not in education.

Is it possible to demonstrate a right to reside on the basis of such a short period of employment?