Multi state model in MVI pattern

I understand that the advantage of the MVI pattern is that it is a single-state flow. So is it really necessary to have only one state model in MVI?

My app has several activities, and the subject of data obtained for each activity is completely different. For example, activity A gets the dog's information, and activity B gets the information of a Github user. In this case, if MVI-pattern should be only one state model, the mvi state model contains all the data information of activities A and B?