Hi, moving you over to Eating for Toddlers as your LO is over 1yo
Is there any chance she is thirsty rather than hungry? I initially showed my DS different signs for drink and food but he combined them into one so it was a case of offering him both or asking for a yes or no answer (or body language) when offering him different things.
Mine also like something one day and not the next, I think in some ways they can manage their own body's needs this way, mine seemed to know just what he needed instinctively (well, that is until he went a bit overboard with fruit!). I wouldn't keep offering a huge variety until she accepts something though, I'd just decide what is a reasonable meal or snack and give her that. If she doesn't want it then she can wait until the next meal. She isn't going to starve herself and you can drive yourself around the bend going through multiple foods and them all being rejected.
There's also quite a drop in their intake needs around and after 1yo which can take us all by surprise. Suddenly they can appear to live off fresh air and as we are so used to them eating more we can be tempted to keep offering different things looking for something they will accept. This is likely a time when we can unintentionally put in place not-so-good-habits by letting them dictate too much what they will eat. Regular food and drink whether milk, snack or meal time is all you need to offer and let her work out the rest. A typical day at this age would include 2 milk drinks, 2 snacks (or 3 if pre-BT supper is needed to replace a dropped BT milk feed) and 3 meals, at regular and predictable times, fitted around naps.
When the next growth spurt comes you will likely see her eat the fridge clean, then appetite will drop off again.
There can also be less inclination to eat when teething, mine liked hard foods such as bread sticks to gnaw on with his sore gums, and sweet/soft fruits, but this would be for a few days rather than long term.
hope this helps some