How to open a window in background?

Hi everyone! I want to open an app in background (meaning no switch workspace, no changing window focus). Below is my current attempt, but will still cause the app window to focus itself on start.

hyprctl dispatch exec ‘[workspace special silent;no_initial_focus on ; focus_on_activate off]’ logseq-wl

That should work. The only way to make it even more silent is suppress_event.

Well, then how can I debug it at least? How can I tell what’s wrong?