Hello,
I am on the documentation page "Migrating fromm J3 to J4, but there is only one single information just to change {slider to {accordeon, no more further information as it was some time ago.
Regards
M. Müller
As far as I know, there has not been more documentation on that there.
Tabs & Accordions is different to the Joomla 3 Tabs and Sliders extensions.
There is no 1-to-1 upgrade path. Some functionality is the same. A lot is different.
Not just the syntax, but also the way things work.