A noter que le plugin n'est plus compatible Joomla 4.0. On attend la mise à jour.

indiqué sur le site : However you can use Tabs & Accordions for Joomla 4+. 

{
accordion title="This is an accordion!"}
This text right here is placed in accordions.

{
accordion title="Another slide"}
Hello :)

{
accordion title="A third slide"}
Hi again!

{
/accordions}