The first question is what will they gain from going public? They already have a solid revenue stream. What will the investment allow Impossible to do that they cannot do already with access to capital?
Also, Impossible recently brought on a new CEO to replace Founder, Pat Brown. I believe he still lives in New York and hasn’t even relocated to The Bay Area yet. He needs to get a handle on the company before they file for an IPO. Additionally, the current economic market is not ripe for investment. Lastly, the holidays are upon us. 2023 is much more likely if market conditions improve and they even need to do so.
Death is the only reason that he will not be in office. Everyone dies at some point. He appears to be healthy, but is 70 years old.