ornaments file and arpeggio sign?

is there a file of ornament snippets available that can be incorporated
into an rg project?

i can make up my ornaments using
Playing ornaments
https://www.rosegardenmusic.com/doc/en/nv-ornaments.html

however, one would think that there is a collection somewhere?
i couldn't find anything in the examples provided with rg.

also, how do we insert an arpeggio sign?
i couldn't find that vertical squigly thing:
https://steinberg.help/dorico/v2/en/dorico/topics/notation_reference/notation_reference_arpeggio_signs_c.html
i know it exists for lilypond, so shouldn't it be there for rg as well?

-- 
In friendship,
prad