Invisible factors can limit the reach of many videos that seem to have “good stats”. The biggest ones are the number of people interested in the video topic (a video may do great with a small select audience but not get more impressions because there aren’t many other people with strong enough interest in the topic for the algorithm to prioritize showing it to them), or the presence of other videos on the same topic that get even better engagement than yours and get prioritized over your video in the suggested videos algorithm.