How to find the average cost of a targ. advertising (CPM or CPC) Google, TikTok, Yandex for 2021?

Question

contextual advertising

Hello. Who knows a service, tool or site where you can see the price chart for targeted and contextual advertising on Google, Yand, TikTok for 2021?
I found it on FB, it's complicated with the rest. I looked at Statista, it's not there)

Answer 1

What about the meaning? There is no usefulness from such data in real life.