Hide suffix commands from M-x completions

[felixdo]

The showcase points out:

Note: Both commands and suffixes from transient-define-suffix can be used. It's a good reason to use private--namespace style names for suffix actions since these commands don't usually show up in (M-x) by default.

However that is not the case for me. I see all the tsc-- suffix commands in my M-x completion.

Do you know what might make them show up for me?

[psionic-k]

Command completion configuration. I personally don't filter them.

[felixdo]

Ok then I got just confused by "filtered by default". Magit doesnt seem to use the -- convention at all, at least I cannot see any magit-- commands when I type M-x.