There could be a really interesting fanfiction where Female Sam is a mechanic who catches Optimus' attention. Maybe she helps repair him in a unique way and they form a bond based on mutual respect for each other's skills.
Well, perhaps in this fanfiction, Sam somehow ends up in the Transformers Prime universe. He might form a special bond with one of the Autobots, like Bumblebee. Together, they could go on adventures to stop the Decepticons from getting their hands on a powerful artifact. Sam's human ingenuity combined with the Autobot's strength would make for an exciting story.
Another possible main antagonist could be a new character created specifically for this fanfiction. A powerful Decepticon who has a personal vendetta against Sam because he believes Sam will disrupt their plans for total domination. This new villain could have unique abilities that pose a great challenge to both Sam and the Autobots.
Female Sam could end up on a dangerous mission with Optimus. They might face a new type of Decepticon threat. Along the way, Sam uses her wits and human intuition to help Optimus strategize. And as they battle side by side, their relationship deepens into a strong friendship.
Yes, there was a sci-fi novel called "Movie Character Invasion." In it, a character entered the world of "Transformers", seduced the female lead, fought alongside Bumblebee, and received the system reward "Bumblebee." In this novel, one could experience a relationship similar to that between Sam and Bumblebee. I think this novel will suit your taste very well, so I recommend it to you! I hope you like my recommendation. Muah ~
Well, the duration of Sam's story really isn't fixed. It could be as short as a short story or as long as an epic saga, depending on the author's imagination and the plot's complexity.