Congratulations @STLoser. This is an amazing achievement.
As @Starwarsandcupcakes said maintenance can be a lot of trial & error. It took me a while (another 11months) to finally stop losing & for my weight to stabilise. I wasn’t eating a lot when I reached my goal (about 900+/- calories) & it took time for my portion sizes to get closer to a recommended serving size. (I also still wasn’t hungry.) I added snacks - like eventually 5 a day. It seemed crazy & I felt like I was eating all day but it was the only way I could get in those extra calories I needed to slow then stop the loss. (I did this with my dietician.) I don’t eat as many snacks now - usually 3 - because I can eat more at a meal. I stabilised at 1300 calories for a year. I eat more like 1400 now because I had to up my protein to 70g (protein absorption issue). Thanks to also needing a higher dose HRT at the same time I put on 2kgs very quickly but have been steady again for 6 months. Fingers crossed.
Just take it slowly as you work out what else you can add to your diet. You may have to keep adjusting until you discover what works for you. So expect some ups & downs. Initially I slowly added extra serves of whole/multi grains (went from 1 to 3 but only about 2 now), a second serve of fruit (1 again now), some extra fat (also reduced some), a few extra vegetables, etc. Kept to my very little sugar/sweet foods & no breads, pasta or rice I established while losing.
All the best.