But why do women tend to have less savings?

I am an office worker in my mid-30s.
Every time I date, I notice this thing..
Even though they have more professional experience than I do, they seem to have less money saved up..
When I told them that I saved 200 million KRW during my 6 years of working
(I work at a mid-sized company / Savings + Stocks + Crypto)
My ex-girlfriend, who was in her early 30s, seemed disappointed.
So I asked her, "How much have you saved?"
And she said she had 40 million KRW.
Honestly, men also hold back on things we want to do, things we want to buy,
and trips we want to take just to save money..
It's not just my ex-girlfriend; listening to the people I dated before
and my acquaintances, I hear similar stories a lot. Why is that?