Eagle part for "MiniLED" SMT LED
"MiniLED" is not a standard package designator.  There is a mechanical drawing in the datasheet, which shows that the part is 2.2mm long and 1.4mm wide.  This is slightly bigger than the standard 0805 and smaller than the standard 1206.

You probably need to make a custom footprint.  Perhaps, you could modify an existing  1206 footprint.