Import bme280 -> no module named 'bme280'

I am programming a pi pico-w with a BME280 with Thonny
I found an example for it . On top of the program there was a line “import bme280”
Thonny said: no module named ‘bme280’
I did a search in Thonny Tools > Manage Packages. No result.
To check the Search function I searched on SSD1306. That worked ok.
Why was the bme280 or BME280 not found?

On Github I saw several drivers for bme280.py.
How can I upload this driver into the flash memory of the pi pico-w?

If you use Pimoroni’s custom uf2 it should be good to go.
Scroll down to the bottom of this page.
Release Version 1.24.0 - Beta 2 · pimoroni/pimoroni-pico

pimoroni-pico/micropython/examples/breakout_bme280 at main · pimoroni/pimoroni-pico

Thank you for your reply.
Sometimes I wrote on a random website that you have to copy the bme280.py to the subdirectory /lib. And after searching /lib I found that one can type in the Shell :

import sys
sys.path
[‘’, ‘/lib’, ‘/mylib’]

Because I don’t have much experience with micropython yet, it didn’t immediately dawn on me that the location of /lib is on the Pi Pico. So I did initially a search of /lib on my pc.
Now my program is working, after copying bme280.py to /lib of the Pi Pico.