Quick thing. Maintenance is an interesting time. It can be a trial and error of sorts...because your goal weight may not end up being your goal after all. I reached my goal...and then got too thin...bony. I didn't feel right. SO worked to put a bit of meat on in a controlled way. Plus I am always experimenting with different things to keep maintenance interesting. I don't like to get bored. So I will do the intermittent fasting some days...and still my awesome workouts. But overall I just eat real and healthy as much as possible. My diet is probably 80% healthy and 20% "Fun".....and as difficult as it is......I do limit alcohol..which can add a ton of weight so easily.
But if you lost the weight the right way in the first place..then the maintenance experiment will be easy too. And we are all different. What worked for one person may very well not work for you. But treat your body with respect. Eat foods to nourish you and drink beverages to enhance your life. I drink a ton of water. Green tea. A little coffee. I eat foods to help me feel great and have energy. I do enjoy myself too. And one of the things I'd read early on is that naturally thin people do enjoy fun things....they just don't do it every day.
But don't fear maintenance. Just keep it interesting!! And know you can have a leeway and control it. YOU are in control now. Food does not control you anymore.