Documentations from the virtual WLIC 2021 conference is not freely accessible  until after one year.

Did you not attend the session? The Bibliography Section blog has published a report about the session.

The presentations are freely available on-line:

Subject to flexibility: Theory and history of knowledge organisation systems / Hollie White, School of Media, Creative Arts and Social Inquiry
Curtin University, Perth Australia

Transparency & Change in Knowledge Organization / Violet Fox

Using Linked Data to Mitigate Colonial Subject Bias / F. Tim Knight