Describe your motivation

vaadin/flow-components#8145 adds the reverse theme variant as a base variant that is supported in all themes, however Lumo actually doesn't support it as the component does not use base styles.

Describe the solution you'd like

Lumo should support reverse too.

Another thing to double-check is that the default stacking order between Lumo and Aura is different, and whether that is intentional. Reverse in Aura is basically the default in Lumo:

Lumo:

Aura:

Describe alternatives you've considered

No response

Additional context

No response