1. Go to a post that has hashtags in the end and allows embedding, like https://mastodon.social/@LinuxAndYarn/111715850911279835
2. Hit "Embed" or add /embed to the end: https://mastodon.social/@LinuxAndYarn/111715850911279835/embed
3. See hashtags not in the end, see also fa fa-retweet etc. in the detailed-status__meta.