Is the order in which you apply cosmetics really that important?

In the past, I thought that simply applying toner, lotion, and cream was enough.

But these days, there are so many different types of serums, and since I use ampoules and even essences, I suddenly got confused.

One day, I applied the serum first, and

The next day, I even applied whatever was right on my hand, but my skin didn't seem to have changed much.

Then, looking at the cosmetic descriptions, some products say to be used after toner, and

Some products say to use them in the final step.

Seeing that, I wondered if I had been applying it without thinking all this time.

I especially thought that layering multiple products would allow me to deliver more good ingredients to the skin,

I also wondered if applying them in the wrong order might actually hinder the absorption of the products applied earlier.

However, realistically, it is not easy to apply one product, wait a long time, and then apply the next one.

Has anyone actually tried following the proper skincare order?

I am also curious if my skin condition changed before and after changing the order,

Ultimately, I would like to properly find out whether the important thing is the order of application or consistent use.