Is hair loss shampoo alone effective for management?

I became curious while looking into hair loss products.

There are actually more types of hair loss shampoos than I thought.

It looks like it's effective in the advertisement, but

I wonder how much help it actually is.

Are there people who see a difference just by changing their shampoo?

Or I would like to know if it is just a supporting role.

I am also curious about the criteria for selecting a product.

I am curious about reviews from those who have used it.