I do not know the complication of doing this but my idea is a game mode in which your invested hours have some more significant benefit, for example:
I think of a single player mode with small online details, in which some strengths or cities can belong to other players, and it is only possible to attack them in a time slot, of course if the player is online he will be able to defend the attack, if not, his defense will be controlled by the AI. You could also make the siege last for a day and you get a message when you open the game that your castle is being besieged, so you have time to plan if you will not be able to be present or just to be present.
If this idea is too difficult or not convincing, perhaps you could somehow transport your character from offline mode to online mode. Therefore, his experience as a player would have an important weight and would give more personality to each individual, there would be cases in which there could be inequality, on the other hand, bannerlord is programmed so that this is not decisive, but in the case of If your weapons and armor are too weak, you can also go back to single player mode and get some upgrades.
I think of a single player mode with small online details, in which some strengths or cities can belong to other players, and it is only possible to attack them in a time slot, of course if the player is online he will be able to defend the attack, if not, his defense will be controlled by the AI. You could also make the siege last for a day and you get a message when you open the game that your castle is being besieged, so you have time to plan if you will not be able to be present or just to be present.
If this idea is too difficult or not convincing, perhaps you could somehow transport your character from offline mode to online mode. Therefore, his experience as a player would have an important weight and would give more personality to each individual, there would be cases in which there could be inequality, on the other hand, bannerlord is programmed so that this is not decisive, but in the case of If your weapons and armor are too weak, you can also go back to single player mode and get some upgrades.

