So she basically never had real food, only processed and ultra processed baby food and this is why she can't swallow, because she never was given the opportunity to learn to swallow.
All this puff, rusks and wafer and ultra processed melty-sort of food like substances.
Since she is interested in your food, maybe you should move from baby food all together . Prepare yourself a soup, and dip your bread into the soup to make it mushy and then give it to her.
It is important that you understand how swallowing, gagging and chewing are connected. Today, at your next meal, try the experiment on yourself, take a bite of your toast and try to swallow without chewing even once. IT will get stuck, because the chewing motion even without using your teeth will produce saliva and lubricate your food and also prepare the muscle in the throat to move the food. Food doesn't now down by gravity, it is muscular (you can even eat upside down) . She needs to learn to chew, so between wet and dry food, there is a whole range in between.
Processed food offers flavours that do no exist in real life. The puffs are nothing more than Cheetos with some veggies dry powder to pretend they are healthy, but they are corn flout and oil, like Doritos and we all love Doritos and Cheetos. And you hope to compete with Cheetos with mash cauliflower? You need to reaper food that is tasty and pleasant and doesn't look like baby food.
Move away fro the high chair, sit together at the dining table, and have the plate in front of you. Have a bowl with baby pasta in a broth, with parmiggiano cheese, and half a tea spoon of extra virgin olive oil. Have one spoonful; yourself , then a baby spoon for her.
Prepare yourself a risotto. Start with white, with just butter, parmiggiano, and leave it quite soupy so she will do both swallow and suck