@Pinkflipflop85 Swallowing is actually an extremely complex process that involves many muscles and needs to be timed with breathing, so start with little quantity.
First you need to consider lubrication, that's saliva that makes the food wet and able to slide down the throat. So yoghurt as a first food is fine, but don't load the spoon. Just give it a quick dip in the yogurt and out. So there will be some yoghurt, and the process of tasting will involve the tongue.
Do the same thing with a lovely and tasty soup, or a soupy puree (so instead of steaming, cook the veggies in 2 cm of water and let them simmer, and then blend all together with whatever liquid is there) or make a vegetable broth and use it to add liquid to food.
Again, don't overload the spoon, fill a quarter or half of it. She needs to learn to push the food at the back of the mouth and not on top, and it is easier to learn it with little food, than with the mouth full.
Once she has mastered the swallowing and moving the food around, you can go back to some finger food, preferring the moist and wet ones, so watermelon for example. Avoid the baby processed snacks (melty puff, crisps, granola. rice cakes,) because you are building your daughter's taste and reference and you want to give her a taste for real unprocessed food.
You can also prepare stew or risottos, or soups with pieces like a minestrone.
Give it a try while you wait for the referral to come through. Let her try when she is interested but slow her down and small quantities