Approval of what? The company can request a name change / ticker change / share structure change at any time. The merger is done already. They submit the paperwork, and it may take 30 days to take effect (if they request a ticker that is not used already).
These new people have never run a publicly traded company, so they may not understand all the details, or care how fast things happen. They did not buy the company for your benefit.
Bullish
No claim as to the relevance or monetary value of the information is made herein. Any opinion stated is my own, and should not be used for investment purposes. No preference of any particular derivative is implied, in spite of wording thereof