Have you taken a look through https://www.fastday.com/fasting/why-am-i-not-loosing-weight-with-intermittent-fasting/
or this recent thread on a similar topic that might have some relevant advice?
https://thefastdiet.co.uk/forums/topic/no-weight-loss-please-help/

It might be easier for people to offer constructive advice is you can share some information. E.g., it might be relevant to know your BMI/weight; how much you want to lose; any medical conditions that might affect your weight and any previous dieting history; approximate age; gender; activity levels; how you conduct your fasts in terms of splitting up your calories, what you eat etc. and whether you’ve calculated your TDEE to guide your consumption on your non-fast days or if you’re tracking/estimating/letting the chips fall where they may; how much you’ve gained from your baseline – you get the idea.

Good luck.