I think the lack of figures is a consequence of there not being an MGS game in development since MGS V. The reason I'm skeptical of Kojima's involvement in approval, is due to the fact that there are so many inconsistencies in the PAK line (differing heights, inaccurate proportions, etc). For a time, it seems like Square was just churning anything out, and it was given the green-light. So, I think it was fan conjecture about Kojima's role in leading marketing, when he's really just dude who enjoys posting pictures on his Twitter account.
Also, there were a few things released since Kojima's departure, such as the MG Survive statue from Gecco, and the Metal Gear... rubber duckies.