One possible plot development could be that Harry is initially confused and resistant to the king's advances. He might be more focused on his own battles against Voldemort or his studies at Hogwarts, and this new situation throws him off balance.
Perhaps the king has some ulterior motives for courting Harry. It could be that he wants to use Harry's power or fame for his own gain. On the other hand, the king might truly be in love with Harry and tries to win him over by showing him a different side of the magical world, a side that is more opulent and full of royal magic. As the story progresses, Harry might start to see the king in a different light and form a bond, which could then lead to a whole new set of adventures and challenges, like having to deal with the political implications of being associated with a king in the wizarding world.
Another plot development could be that the wizarding community reacts strongly to the king courting Harry. Some might see it as a threat to the existing power structure, while others might support it as a way to bring about change. Harry would then be caught in the middle of this political and social turmoil. There could also be a sub - plot where Harry discovers a hidden connection between the king and his own family history, which further complicates the situation and makes his decision about the king's courtship even more difficult.
Another development could be that the king's courtship is part of a larger political plot. Harry discovers that the king has ulterior motives, like using Harry to gain influence over the wizarding world. Harry then has to figure out how to expose the king's true intentions without causing chaos in the magical community.
Well, without reading the specific fanfiction, it's hard to tell exactly who the king is. It could be an original character created by the author, or perhaps it's a character from another fictional universe that the author has incorporated into the Harry Potter world for this unique plotline.
In the fanfiction, it could be that Harry faces opposition from some powerful wizarding families who don't want him as high king. They might try to undermine his rule through various means such as spreading false rumors or plotting against him. Harry would then have to prove himself worthy and strong enough to maintain his position.
Perhaps during the rebuilding, Harry has to deal with various magical creatures that have made the ruins of Potter Manor their home. He might have to find a way to relocate them without harming them. Also, he could be visited by friends from Hogwarts who offer their help and in the process, there are some interesting interactions and exchanges of magic knowledge.
In this fanfiction, it's likely that Harry's newfound lordship at age 7 will have a significant impact on his relationship with the Dursleys. They might be even more intimidated by him, or perhaps they try to take advantage of his new status in some way. Harry, on the other hand, could use his new power to free himself from their abuse and start living a more independent life within the wizarding world. He may also discover new magical abilities or artifacts associated with his Potter heritage that help him in his journey.
One possible plot development could be that Harry has to face a lot more internal conflict. He would be associated with a house that his friends might view with suspicion. Also, he might discover new magical abilities or powers that are related to the Slytherin heritage.
Well, one possible plot development could be that Harry has to hide his new status as an Obscurial from his friends at Hogwarts for fear of being ostracized or worse. Another could be that Voldemort somehow discovers Harry's new condition and tries to use it to his advantage, perhaps by trying to manipulate the Obscurial power within Harry. Maybe Harry has to learn to control this new, dangerous power on his own as he can't trust Dumbledore or the other teachers with this secret at first.
It could be an original character created specifically for the fanfiction. Maybe a powerful wizard king from a far - off land who has heard of Harry's deeds and is intrigued by his power and courage.
One possibility is that Harry's squinting eventually leads to a confrontation. He might directly question Malfoy about his actions, which could either end in a fight or a reluctant alliance if they find out they have a common enemy.
One possible plot development could be that Hermione is left with a deep sense of guilt and responsibility. She might then take on Harry's mission or cause in his memory. For example, if they were fighting against a new dark wizard, Hermione could become even more determined to defeat the enemy.