I see a couple of issues:

1. Many teachers don’t know how to code themselves. If you can attract career changers from IT over to the teaching profession, you can address this, but at the moment teaching is not an attractive profession compared to IT unless you already have a passion for teaching.
2. Teachers are bound to by the prescribed curriculum. While there is some scope for flexibility in how you cover the dot points, spending too much time on coding concepts would mean falling behind on covering the rest of the content mandated in the curriculum.

In my part of the world, there is a key learning area called “Technological and Applied Studies”, of which Information and Software Technology is an elective, but finding qualified teachers is a real challenge – not the least of which is that there are very few Initial Teacher Education providers in my state who can offer accreditation in TAS.

I don’t have access to TikTok, but the following article challenges the traditional transmission model that is still quite prevalent today: https://educationrickshaw.com/2017/12/02/after-100-years-of-the-same-teaching-model-its-time-to-throw-out-the-playbook/

Students will certainly learn from each other. The question is, what will they learn? The transmission model is seductive because it allows the teacher to ensure that the content meets the the required learning outcomes laid out in the curriculum. Giving students more autonomy may work well for some, but there will also be a lot of cases where students will not engage with the desired content, and will instead find other things to entertain themselves. Keeping students on task is a constant challenge, but with the transmission model there is at least the illusion that students are taking in the required content.