Aliases can't work

I typed in

aliases: [concept, thought]

But it shows

As far as I understand, aliases don’t show on the note itself but rather when you do a search or use [[]] to mention the note in another one.

If you mean you want to see the aliases in read mode, make sure Settings > Editor > Show Frontmatter is toggled on.

aliases: concept, thought

I had a [[notes|thought]] and [[notes|concept]].