ей следовало

she should have

→ она
phrase Rare #47,652
she should have An impersonal construction with the dative pronoun ей (“to her”) and an infinitive. It expresses that she ought to have done something, often with an implication that she did not do it.
RU: Ей следовало позвонить раньше.
EN: She should have called earlier.

Ей следовало его пригласить.

She should have invited him.

И я не думаю, что ей следовало убеждать тебя.

And I don't think she should have tried to convince you.

— Оппенгеймер (2023)

Ей следовало ему помочь.

She should have helped him.