R2 contents are not loaded other coutry, my country is ok

I am hosting the web in vercel using nextjs.
The image file and video are stored in R2 and the public url address is set up
I use nextjs to hardcoding with json file,
The problem is that the website made according to the above in Australia provides images and videos without any problems, but the images do not come out when accessed from Korea.

The strange thing is that some people in Korea normally take time, but the images come out well, and some people don’t come out at all (even over time)

I don’t know what the ■■■■’s going on.

Should I stop using R2 and compress images and videos and save them to a static file?