It depends. We mostly buy from amazon so no big changes there unless specifically stated. You'll see more of that from smaller / private merchants. Also depends on the countries they are located in. Not that long ago I ordered something from China and was surprised how quickly it got here (the US). I did buy from there before and in the past they would provide me with tracking numbers, not this time.
I'm always estimating prices using this package shipping calculator based on location https://aecparcel.com/shipping-calculator/