Unless someone important has died far away and left you with no choice, perhaps before you go on the news to bellyache about how long your passport application is taking to process thanks to the gigantic pandemic backlog and how you might have to cancel your trip because of it, consider not booking a trip before you have your passport in your hand. It will save you, and also me, a whole lot of irritation and frustration.
Note: I am not a renowned travel expert. I hate traveling. If I can avoid going as far as the next town, I will. I am merely someone who has been served rather well by making use of the thinking mechanism housed inside of his head.