@Tortoiseandhare89 for us the answer to this questions was “kind of” - and of course all children are different. I can only share what was true for our child.
babies like to experiment and learn. food isn’t yet necessarily understood as simply “food” at such a young age, there are many things that the baby is interested in “What is this? What does it taste like? How far will it fly if I fling it? Will it go splat? Do I now want to feel the texture in my mouth” etc.
So throwing, squishing, other playing is all part of it really. We did BLW pretty well exclusively (I can remember spoon feeding DC on maybe 3 occasions in his life) and the mess because of the joy of squishing and flinging was considerable for a (long) while.
at 12 months your baby has already had approx 6 months to get used to different ways of eating - especially if you have been primarily doing BLW as you state. They are probably reasonably skilled at putting food in their mouth and possibly even using a spoon. The more practice they get the better they will get at these skills
with mine, I came in time to realise that when there was more flinging than there was eating then the meal was over. I was quite indulgent for a while and put things back on the plate again and again only to have it dropped/flung etc. When I twigged this pattern I didn’t allow such a lot of the flinging. When it started, I removed the meal and that was all. If baby started making it clear that they wanted more (signing, whining, pointing etc) I would have course provide more.
Through all this my baby loved to have songs sung and stories read etc. But I didn’t use them to help him eat more food per day as I felt it was my job to serve the food and his job to eat it (or not- he might not have been hungry, the food might not have been to his taste) we still use this mantra now, and it works well for us. He is a preschooler with fairly typical tastes but he eats a reasonable amount of fruit and veg, and when hungry will happily try things in restaurants that some adults wouldn’t be interested in.
kids eat in colour and solid starts on instagram have been really helpful to us.
but do try not to worry. Not only is your baby having lovely food he has a lovely mum who also wants to sing to him and make him happy 💙