Fediverse pro tip: Re-boost your own content.
There is no algorithm. Posts are equal like they should be. It doesn't matter what you like, how many followers you have or how prominent you are as an "influencer". The time, moment, content, frequency and boosting are the only things that help your visibility here. It's a good thing.
It's funny that sharing function is almost obsolete in other places. Here it still serves a purpose.