I’m the social media manager at Dash Social, and based on those numbers, I wouldn't assume there's a problem.
One thing a lot of people miss is that distribution doesn't happen in a straight line. Platforms tend to test content in waves. A post can get a strong initial push, plateau for a bit, then get picked up again later if the engagement and retention data continue to look good.
Also, retention is only one piece of the puzzle. The platform is likely looking at things like shares, saves, comments, rewatches, and how that content performs relative to similar content being tested at the same time.
I've seen posts with worse retention outperform posts with better retention because they generated stronger engagement signals overall.
At 4 hours in, I'd probably be patient. 2,100 views is still pretty early in the lifecycle of a post, especially on platforms that rely heavily on recommendation-based distribution.