It really depends on your IF goal - weight loss, maintenance, health issues etc.
You don’t seem to be doing a no-carb or low-carb diet so I think it’s no harm. Plus, baked + air fry seems harmless, and let’s not forget that there are actual nutrients in a potato compared to let’s say white rice or plain white bread.
Now, regarding that chocolate spread. I’ve been adviced by long-term fasters that it’s not encouraged to have a sugar rush (especially processed sugar) right before fasting. I love dark, bitter chocolate so that’s usually my go-to. But but, it’s all about what is working for you.
As to potatoes, I eat them from time to time:
in soup, stews, curry 1:1 to 1:2 with different vegetables and plenty of those
boiled 100g per serving one time a day, not too often
It didn’t stop my weight loss.
It’s good if you can eat them cold and with vinegar, preferably with ACV (potato salad?). I haven’t tried that yet.