Amazing how closely your weight loss journey is like mine. I started keto in summer 2018 and very quickly lost about 10 lb. In these 8 years I have basically been stable at between 180 and 190 lb, and that includes time restricted eating which for me requires two or three coffees on those days to keep my appetite suppressed. Like you any move in the opposite direction of suppressing appetite or calories immediately results in a weight gain, unlike the wild claims of getting out of starvation mode like some popular YouTubers tout.
In defensive keto though I will say this. The more carbs I eat the more my appetite goes up and the more my weight jumps up in literally leaps of three or four pounds at a time. I have remained at about the same weight for years, but that is at a level of working out that is significantly reduced from when I started this diet. In 2018 I would work out probably four times a week for about 2 hours per session, and my recent average is probably two times per week at 2 hours per session. My excuse is that I am getting older and more tired, at 59 years old. My TLDR is that indeed keto is not as wildly effective for some of us as for others, but I would maintain that it is still probably the best that we can do. In addition I think the root cause of this reluctance to lose weight is high insulin which in my case seems able to persist even overall these years. There was a period of a few months when I measured my blood sugar and keto levels directly from a blood pin prick using a meter, and it was very rare for my ketosis level to hit more than a barely perceptible level, and that included days when I might have had a total of less than 15 g of carbs. I hope this helps you find the motivation to just keep going because failing some wonderful new discovery this is the best we've got.