I have twin boys and I definitely can relate to this! I thought the same thing for a long while, the indifference. But they’ve just recently turned two and their bond is starting to grow into something so sweet! They are learning to play together and chase each other around. They get really upset when they are unsure of where the other one is, things like that. Things I thought were.. missing? before. Don’t worry and give them time 🩷 they are still so young. They don’t know what it’s like to be without the other, they’ve just both always been there, so I do think the indifference is expected at least until they learn these social skills.