Honestly, I think the "prime time" thing is a bit of a myth now because the algorithms are so interest based rather than chronological. I’ve found that consistency and actual quality matter way more than hitting a specific 9 AM window lol. If the content is good, it’ll find people’s feeds whenever they log on.
I’ve been testing this by shipping 15 to 20 pieces a week lately just to see what sticks. For me, the real unlock wasn't finding the perfect hour, it was just making it faster to produce different formats like carousels and short clips. I usually just batch everything in a tool like Runable since it handles images and videos in one place, then schedule it out and forget about it. Focus on the hook and the value first, and the engagement usually follows regardless of the clock.