SPOILERS
after completing lins new story event you cant explore the city anymore because its on lockdown. i never did the new events around the city before this so is there any way i can do them now? or do i just have to reload a save
Because all explore content is early game content designed to introduce you to this world, it is intended that you will lose access to it after a certain point. Any story content from the city will be lost if you decide not to do it by this point in the story, as it would not make much sense. But the explore content is planned to return with a whole new set of events, re-introducing you to a world that has changed.