While on the subject of ACL 2023 tutorials, here are two I went to:

Complex Reasoning in Natural Language https://wenting-zhao.github.io/complex-reasoning-tutorial/

Generating Text from Language Models https://rycolab.io/classes/acl-2023-tutorial/

the second one in particular was very well taught. I didn't catch the Retrieval based talk, since it conflicted with the text generation one.