When will the product be available for testing?

We have kicked off many a study where the product under testing was not yet available even for us to explore because development was ongoing or access still had to be sorted out. The UX researcher cannot start drawing up a discussion guide or a script until they have actually accessed the product and had the opportunity to explore its features for themselves. In this case, the start of the study is dynamic, and depends on when access to the product under testing will be possible. If all of the stakeholders understand this, it should not pose a problem.