I think it's worse as others I know did lots on their 60th
They presumably did 'lots' as they arranged to do 'lots'.
I did, too, because having those big birthdays s a nudge to remind me to get in touch with people I love spending time with but sometimes leave it too long to get in touch.
So I arranged a lunch for 3 school friends I'm still in touch with
I arranged a big daytime meet up / picnic with all my nieces, nephews, great n&n, dc, siblings, in-laws (and a couple of friends came)
I arranged to go for an afternoon tea with a good friend of many years
I arranged a lunch with some ex-colleagues
I asked to go out for a special meal with dh and the (adult) dc
I went for a pub meal with dh's family
I had a lovely few weeks.
I had a lovely few weeks because I messaged people and said 'Do you fancy doing....', and I said to my dh 'Shall we go to.....', and I set up a WhatsApp Group to say 'Anyone fancy a day out to .....'
Whereas you seem to have not done big celebrations historically, and are now being sad because no-one realised you'd have liked to have done something, as you didn't tell them.
Why don't you talk to people about what you fancy doing ? 