I see from other posts that a few people have recently reached their goal. Many Congratulations!
Now for keeping it off. Enjoy your new size but dont be scared. There has to be more to life than obsessing about a pound or two, so just take things slowly.
Important, know your new TDEE ( maintenance needs) check an online calculator for this, use it as a guide then its trial and error.
I found it best to slowly increase daily calories, say 100 cals for the first week or two, then add another 100 and so on, until you find the level to maintain at. Then just try and eat healthily 80% the time ( less healthily 20% of the time!), continue with some exercise you enjoy and check your size or weight fortnightly.
In my case I have a little black dress that I try on every so often to see how it fits ( without the Spanx 😁). I tend to allow myself a 3-4 lbs gain before I take action .