Honestly, what's generating the most engagement for me on linkedin these days are posts that tell a personal story of failure or learning, not the typical look how I achieved this, but rather I messed up and learned this other thing, people are fed up with fake success and value it much more when you show vulnerability or mistakes you've made and how you resolved them, an honest post where you recount a major blunder that cost you money or time, but with a clear lesson at the end, multiplies the comments, and people send you messages thanking you for your honesty.
Carousels with practical tips are also doing well, but with a homemade design, not the highly produced ones, people feel more connected when they see that you're not a professional designer, but the information you share is excellent, carousels of seven to ten pages with clear bullet points, real world examples, and a call to action at the end are performing better than long videos, linkedin's algorithm now rewards reading time, and a well made carousel can keep people scrolling through your post for several minutes.