How do I use ha-top-app-bar-fixed in a custom panel?

Hi,

I’m trying to develop a custom panel for an integration I’m building.

I’ve looked at the browser_mod and hacs integrations and they use lots of the Home Assistant front end components, like ha-card etc.

Ive been trying to use ha-top-app-bar-fixed, but it just doesn’t seem to work.

What do I need to do? I’m registering the panel as a module and it’s rendering, but just not how I’d expect!

Any help would be appreciated!

Tom