It's a bit hidden (in bootstrap_grids/Configuration/TypoScript/tsconfig.ts) so maybe it could be added to documentation :
Backend control over content element available to editors.
To hide unwanted content element you can use page TSConfig or User TSconfig.
Page TS to hide tabs options:
tx_gridelements.excludeLayoutIds = tabsSimple, tabs4, tabs6
Or as User (or goup) TS to hide slider, cols and accordion:
page.tx_gridelements.excludeLayoutIds = slider, 2cols, 3cols, 4cols, accordion