Yes, there are quite a few out there. You can start by looking on popular fanfic platforms like Archive of Our Own. Just search for 'tfa prowl x bumblebee' and you'll likely find a variety of stories, ranging from action - packed adventures to more character - centric, emotional tales.
Another place to check is FanFiction.net. It has been around for a long time and has a vast number of fan - created stories, including those centered around these two characters from the Transformers franchise.
One great 'bumblebee x prowl fanfic' could be one that focuses on their unlikely friendship in the midst of a big battle. For example, a story where they have to team up against a common enemy and during the process, they start to understand each other's motives and values more deeply.
Well, aside from the ones mentioned above, there can be themes related to protection. Prowl might be portrayed as protecting Bumblebee due to his more vulnerable nature in some aspects, or Bumblebee might be the one protecting Prowl in a different situation. There are also fanfics that have themes of growth, both as individuals and as a duo. They might start off as not getting along so well, but as the story progresses, they grow closer and become better versions of themselves through their interactions with each other.
Bumblebee could develop more patience. Usually quite impulsive, spending time with the more patient Prowl might make him think twice before acting. For example, in a battle situation, instead of just charging in, he might start to analyze the situation like Prowl does.
Maybe Bumblebee loses his memory. He forgets who he is and who Prowl is. Prowl then has to help him regain his memory while also protecting him from the Decepticons who see this as an opportunity to turn Bumblebee against the Autobots.
Well, it could be that Prowl, being the logical and sometimes cold - calculating type, might hurt Bumblebee's feelings. He could dismiss Bumblebee's ideas or contributions in the fanfiction, making Bumblebee feel unappreciated and hurt. This can create a rift between them and lead to a more complex relationship dynamic in the story.
One reason could be jealousy. If Bumblebee is getting more attention or praise from the other Autobots, Prowl might feel envious and act out in a way that hurts Bumblebee.
Well, it could be about their friendship. Maybe Bumblebee gets into some trouble and Prowl has to use his cool, logical thinking to get him out. For example, Bumblebee might accidentally disrupt a peace negotiation between the Autobots and some other species. Prowl would then step in and use his strategic skills to smooth things over, while also teaching Bumblebee a lesson about being more careful.
One idea could be that Prowl and Bumblebee have to team up to solve a mystery on Cybertron. Maybe there are strange disappearances and they suspect a new Decepticon plot. They start investigating together, with Bumblebee's energetic nature contrasting Prowl's more reserved one, leading to some humorous and tense moments as they try to figure things out.