this allows you to set the desired height of the scrollable content in pixels. It defaults to 300. If you want to change it, just add a number, no need for units.
Scrollable content button icon
this allows you to set the icon used for the scrollable content button in the composer.
Translations
The component comes with one string that you can translate.
I believe it was working until recently and had been archived possibly a little too prematurely as part of an overly enthusiastic clear-up back in 2021. I think it just hadn’t needed anything updating since. (until now, at least).
Actually, the bigger problem, institutionally, is that someone archived it but left it marked as “official”. (But I’m not part of the institution, so I may be wrong!)