I'm curious, because I only have my own to go on, and my siblings and I agree that our mum has alwas been emotionally unavailable.
Growing up I could never talk to her, she was never listening, always too busy, and if I said something she couldn't handle she'd just switch off. No discussions about anything sex or period related or anything 'important' ever took place. When I lost my virginity she just said 'oh [my name]' with a disappointed sigh. She was unavailable - present physically but no more than that. My sister took care of my physical needs like bathing (she was 11 years older) and I don't recall my mum ever bathing me. When I was ill I wanted my sister as she took care of me. She tells me she would get up to me in the night as a baby too. My mum fed us, did school runs until I was around 9 when my brother took over, and was present but she just wasn't 'there'. She never played with us or did stories, she was always busy with housework, I could be 'gone' for hours in a distant part of the house (town house) and she'd never notice.
I left home at 16 and went to live with my sister. She and her husband parented me. I don't recall missing my mum at all. I've never missed her. Is that normal? I speak to my sister every day, we're both adults with our own kids, we see each other 2-3 times a week. I feel so close to my own kids and hers, and talk about all sorts, even though they're only young. I love that intimacy.
Mother's Day is approaching and as usual I feel awkward as all the cards are so gushy and I just can't say those things. She's a really nice, kind lady and I love her, but I could easily not speak to her for months and it wouldn't matter to me.
I think the truth is I didn't ever really attach to her as an infant. Because I don't really feel attached. It's a very hollow relationship.
AIBU to ask how yours is....good and bad. One of my friends is literally best friends with her mum, who has always been completely involved in every part of her life. I can't imagine that.