How to import data into google spreadsheet from website in js?

Question

JavaScript

https://belpost.by/Otsleditotpravleniye?number=VV3...
https://evropochta.by/
I want information about the location of the parcel to be imported from these sites into my Google spreadsheet.
But when I do it through a formula, it says there is no data to import.
As I understand it, this data is not on the page, they are pulled up from somewhere
. But, I don’t really understand this.
Can you tell me if this can be done or not?