I received the e-mail confirming Twitter developer account application on March 5, 2018.
I received an e-mail requesting additional information on June 5, 2018, and I replied it on September 25, 2018.
Now, the Twitter developer page still says
Your developer account application is pending. You may manage your existing apps but need to wait until your application is approved to create new apps. Please check the email associated with this account for updates on your developer application.
Is there any progression?