My talk session was recently featured on a well-known international company’s blog and I’m not quite sure if I could add it as evidence for the mandatory criteria
It can be an evidence for the mandatory criteria. However, I am not sure whether a single talk session will be enough or not. Perhaps you should think of everything else that can contribute towards that criteria and review whether all of that added up makes up for the criteria or not?
If the talk session reveals your work and contributions in the digital technology sector then you can use it as an evidence.