Hi, I've tested it and it works perfectly for me. Don't hesitate to share your code to find out if the problem isn't there.

guide example shows smth different
as you are showing pure discord
not the ui package

guide example shows smth different as you are showing pure discord not ui package

The link to the example seems incorrect

Yes, that's the whole point of this bug report.

Yes, that's the whole point of this bug report.

Oh sorry, I thought this repo wasn't about https://github.com/discordjs/guide

It's not. It's about https://github.com/discordjs/discord.js/tree/main/apps/guide.

I've investigated this issue and it seems like the problem lies with upstream mdx not supporting markdown within parameters. The DiscordMessageReply UI component currently takes in the reply content through DiscordMessage's reply.content prop, meaning mdx will not render markdown within that reply.content string.