Regarding Yachiyo

I understand that Yachiyo is Kaguya who has travelled back in time 8000 years prior. From my understanding, when Kaguya was stranded 8000 years ago, she hoped that she would at least be able to meet Yachiyo to guide her/help her. As time passes Kaguya realizes she is Yachiyo, and she is the one who will create Tsukuyomi.

Like a lot of people, the Android body that Iroha makes is a little confusing to me. Who exactly is in the Android body? We know Yachiyo is able to split into multiple clones, but my understanding was that the consciousness between the clones are shared.

But at the end of the movie, right before the concert, Yachiyo says to Kaguya something like “This is your first concert in 8000 years, but for me it’s only been a week”

Also, in the epilogue MV https://youtu.be/356MRZ6P5h0?si=7IcAawjbQh8K0pOH at 0:18, Android Kaguya turns around with her phone showing Yachiyo.

Does this suggest that their experiences/consciousness are not shared? This part specifically always bothered me, because it would suggest that Yachiyo has yet to feel Iroha’s warmth, right?