Life as a DINK in my mid-40s

I am in my mid-40s, married for over ten years, and have no children.
I have been working at a public institution for about 20 years with an annual salary of approximately 90 million KRW + my wife makes about 30 million KRW (freelancer).
We own two houses, one in Gyeonggi-do and one in Seoul.
We have about 300 million KRW in loans.
We have about 100 million KRW in liquid assets.
This is roughly my current situation; living without children isn't particularly exciting, but the difficulty level of life is very low.
Since we don't need to move to premium areas for children's education, we save a lot on housing costs.
And since there is no major need to worry about retirement, I don't feel the urge to go all-in on stocks or the US market for wealth management...
When I was younger, there were so many things I wanted to buy and do.
But as I've aged, I feel like I've tried everything and bought everything I wanted; my desire for material goods has decreased... there isn't much to spend money on.
At the beginning of the year, when Tesla was having a sale, I bought one even though my current car was working perfectly fine.
But after driving it for about six months, the excitement has worn off.
Perhaps because I skipped the stage of life involving the ups and downs of raising children, I feel like I've aged prematurely.
There are moments when I wonder if this is why people have kids, but it's not that I deeply regret it.
I feel like life shouldn't be like this yet, but it feels quite bland and uninteresting.
The autumn breeze is getting chilly, so I'm just leaving this random post.