You can test the site going to this page https://www.opengraph.xyz/url/https%3A%2F%2Fpython.pe.
Also, this StackOverflow question seems relevant for testing locally OpenGraph cards https://stackoverflow.com/questions/8569892/how-to-test-open-graph-on-localhost.
You have to check the Shibuya documentation on https://shibuya.lepture.com to learn how to apply effectively the OG tags into the site.