I think it's whatever you like and the things you mention are a good start because they're obviously the things that are important to you.
You say you'll still work and commute, but if you're getting to a position where you don't need to work (as much) and you value more time, look at reducing the hours you work or possibly changing to a less demanding role. But it depends on what options your workplace, industry and pension offer.
I'm in my early 50s and my current plan is probably next year move to working 90% over 4 days and then in about 5 years time working around 50/60% over no more than 3 days a week, which I can do because I have an old pension that I can start taking then with only a relatively small reduction for taking it early.
For yoga and massage, how about joining a really nice gym or spa that offers these facilities? Talk to your hairdresser about the treatments or seek recommendations for a good salon. Cosmetic dentistry is a huge industry now, so definitely look into that too.
Is it that you've had a lifetime of being careful with money and just thought 'that's not for me'? Well now that's paid off and you have the freedom to not have to think that any more. I listen to a the Meaningful Money podcast which is about investing and they say this is common and a hard mindset to get out of, but it's something that you should definitely allow yourself to do.
https://meaningfulmoney.tv/2024/07/31/big-mistakes-not-spending-enough/
https://meaningfulmoney.tv/2022/11/16/strategies-for-spending-it-all/
How about designating a pot of money, eg a portion of your current savings/investments, and/or a monthly amount and then every time you think 'I wish I had nicer teeth but invisilign is so expensive' (for example) but if you have the money in your pot, just do it?
I know how you feel and it's something I'm currently struggling with. I was brought up by working class parents who were and still are very careful with money. It's just not in our nature to spend a lot on anything and bargain hunting is ingrained. But DP and I have a relatively high disposable income, we're mortgage and child free and both earn slightly above average, so we don't have to worry about money, especially as I have an excellent pension. But I especially find it hard to get out of the 'penny pinching' mindset. But today I took a baby step in that I've decided to buy a membership for a local place I love (Yorkshire Sculpture Park). I currently don't go as much as I like as it's about £10 to go, but for a whole £80 a year(!) I could go every day if I wanted to.