Pronoun question

Question

In the quiz question "se les han acabado las camisetas que me gustaban" what job is "les" doing?

Answer

This is the accidental reflexive se with an indirect pronoun. The indirect pronoun les refers to they and the han acabado relates to the t-shirts [plural]

If the sentence was: I have run out of t-shirts it would be - se me han acabado las camisetas... or with we- se nos han acabado las camisetas..

Answer

Hola R,
The accidental "se" used with indirect object pronouns is linked to what is called "dativo de interés". We have a C1 lesson about this. Have a look here.
Saludos
Inma

Answer

Thanks, I read the lesson. I feel like level B2 might be as far as I go...