Yes, there might be. There are numerous fanfiction platforms out there like Archive of Our Own (AO3) where such stories could potentially exist. You can try searching on these platforms using relevant keywords to find it.
You could try Fanfiction.net as well. It's one of the oldest and most popular fanfiction platforms. There are a lot of works on there, so it may take some time to sift through, but it's a good option. Also, check out some niche fanfiction communities related to the specific fandom that these characters belong to. They might have their own repositories or links to relevant fanfictions.
A possible plot could be that Rhaenys and Robb meet by chance, and despite the initial shock of their different backgrounds, they fall in love. Their marriage then becomes a symbol of hope for a more united Westeros. They might have to overcome the objections of their families and the political unrest that such a union could cause. It could also involve them learning about each other's traditions and forging a new path for their combined houses.
One way to find fanfiction about Rhaenys Targaryen and Robb Stark getting married is to join relevant fan communities. For example, on Reddit, there are sub -reddits dedicated to different fandoms. You can post a request there asking if anyone has read or written such a fanfiction. People are usually quite helpful in these communities and might be able to point you in the right direction.
One possible plotline could be that they meet in a secret location. Maybe Rhaenys is on a mission and Jon stumbles upon her. They initially distrust each other due to the complex political situation in Westeros. But as they start to talk, they realize they have more in common than they thought. They both have a sense of justice and a desire to see the realm in a better state. This could lead to them forming an alliance and working together to face the various threats in Westeros.
There could be a wide range of storylines. Maybe some fanfiction imagines what if she had overcome the obstacles and claimed the throne. Or it could delve into her untold love stories or her hidden powers that were never discovered.
Well, given their different backgrounds, their relationship development could be a bit rocky at first. Jon's upbringing in the North makes him more down - to - earth and practical. Rhaenys, as a Targaryen, may have grander and more ambitious ideas. However, they could find common ground in their desire for a better Westeros. For example, Jon wants to protect the North and all of Westeros from the threats beyond the Wall, while Rhaenys may want to reclaim the Iron Throne for the Targaryens. As they work towards these goals together, they could start to respect and love each other.
The most common one is probably dealing with difficult customers. Some customers can be extremely rude, demanding refunds for no good reason or just being verbally abusive.
One key event was the founding of Broadcast.com. It was a huge success and its sale was a major milestone. Another is his acquisition of the Dallas Mavericks. These two...
There might be smokescreen young fanfiction that delves into his relationships with other characters. He could form an unlikely friendship with a character from a different background, and the story...