Is there no concept of Atman in Suttas?

While discussing the answer to a question in comments I was told that there is no concept of Atman in suttas. My understanding is that atta covers the concept of Atman. Atman is soul or self which is imperishable and we return to Atman after death. Atman never dies. If we see DN 1 it covers all kinds of self views including the Atman as follows : ‘The self and the cosmos are eternal, barren, steady as a mountain peak, standing firm like a pillar. This is the Upaniṣadic view of the eternal ātman that is the immanent soul of the world or cosmos, loka. Elsewhere in the suttas such theorists assert that the self and the cosmos are identical (SN 24.3:1.3: so attā so loko). ‘sassato attā ca loko ca vañjho kūṭaṭṭho esikaṭṭhāyiṭṭhito; So my question is : Is there no discussion in Suttas about Atman ?