It's good that the DH here has one day with the nursery child per week, so the child does 4 long nursery days, not 5. Even so, 7.30 to 5.30, 4 days per week? It would be lovely if OP could also have at least a day in the week with her pre-schooler.
I assume the older kids also did several years of 7.30 to 5.30 in childcare? It's good that your DH can now pick them up from school though.
OP, I'm in my 50s now and my three are 20, 18 and 16. Honestly, the time flies and they slip through your fingers. I remember a health visitor telling me this when my eldest was a few days old. But it's true.
My husband is kind of a workaholic and he's always been self-employed - involved in about 10 companies at any one time, vey successful, made multi-millions through company sales, IPOs, investments etc. He was rarely in 'off work mode'. This is his personality. He never knew how to 'switch off.' With 3 DC, I balanced all this out by SAH, which I loved (which was just as well)! Some may say this was a risk, but I didn't see it that way because, even if we had divorced, I would have walked away from the marriage with far more than I came in with. Also, all our money and assets were always for the family, no separate bank accounts and that type of mentality.
We now have 2 at uni and when the youngest DD got a boyfriend recently, this seemed to trigger DH who got quite upset and said that he feels he's missed a lot of time with them that he can never get back. He says he wished he'd been more involved in the day-to-day stuff - helped them with homework, friendships, etc or just 'been there.' But the thing is, he is not that type of personality to just 'be there' - he's too hyper. We talked it out and I reassured him that his role has definitely been as important as mine - not least as he financially facilitated it! So yes, I put a lot of energy into their education, including certain things more recently that almost certainly gave them an edge in terms of Oxbridge applications, but it was his money that paid for their schools, at the end of the day. And which means that they won't have student debt and we can help them into the property ladder. So many opportunities facilitated by his hard work. He sees this of course, as do the kids. So there's no 'right or wrong' - just families adapting to their specific circumstances. But, if you're not happy at this stage, OP, talk with your DH and have a plan together to see if you can make some changes. Don't just plough on, feeling as if you are missing out (if that's how you feel), because you will be surprised how quickly two years becomes ten years and so on. If my DH had ever indicated he felt he was working to much, I would have encouraged him to shift gear. In fact, I tried many times over the years to get him to take on less, but as I say, you can't change people unless they actively want to change.