So, wild, probably nigh-impossible challenge: get an Indian Bourbon on the throne of some European kingdom, whether it be France or not, sometime after the fall of the Bourbons IOTL.
For those who don't know, the Indian Bourbons are a branch of the family (or at least claimed branch of the family) who trace their lineage back to an estranged small-time Bourbon noble who got stuck in the Mughal court; they're sometimes known as the house of Bourban-Bhopal due to the city they have resided in and become synonymous with in later generations.
Good luck and saubhaagy!
For those who don't know, the Indian Bourbons are a branch of the family (or at least claimed branch of the family) who trace their lineage back to an estranged small-time Bourbon noble who got stuck in the Mughal court; they're sometimes known as the house of Bourban-Bhopal due to the city they have resided in and become synonymous with in later generations.
Good luck and saubhaagy!