At a certain stage DLC Assassin's Creed Valhalla's Wrath of the Druids need to help the high king Flann unite several kingdoms of Ireland to strengthen each other.
You can do this with royal requirements, which are small side quests - they can be completed in many cities and trading posts in Ireland.
How to complete the Royal Requirements
You can find task checkpoints on any trading postthat you capture in Ireland. These missions are located in dovecotes - they are easy to recognize on the map by the icon that looks like a birdhouse. Approach them, press the interaction button and collect the side quest reward.
You can execute royal claim in free time. The start point of the mission will be marked in the quest log - it leads to a certain location on the map in the region that you are trying to increase in your favor. For example, any royal requirements in Mid will redirect the player to that region.
Side quests consist of stealing items or clearing an area of enemies.
All Royal Claims are accompanied by royal request is an optional item in the task, for which you can get additional rewards to increase the level of loyalty of the region.
How to increase your reward
Put the raider tent to your trading post to get more resources. Not every point can be improved in this way - before completing the Royal requirements in the region, look at the list on the map to see if it is possible to put up a tent at a certain place. For example, this can definitely be done at the Drumlish trading post in Mid.