Assalamu alaykum Ustadh Ahsan Allahu ilayk Is it allowed to study psychology for a woman so that she can become a therapist for muslim sisters? Please note that it is in an online university

It is allowed if she has sound creed and can tell its truth from its falsehood, because much of what is taught today ignores the worshipper's relationship with Allah, and she works only with women, without mixing.