LEO only has "sparkling" [Adj.] so far, no mention of "sparkly".
Definition of sparkly
: tending to sparkle : shining with or reflecting bright points of light
"sparkly Christmas decorations"
"Run by various entrepreneurs, the vehicles … are cheap, plentiful, and known for loud music and sparkly disco balls."
a. Giving off tiny flashes of light; glittery: a dress with sparkly sequins.
b. Lively; vivacious: a sparkly personality.
2. Effervescent: sparkly cider.
shining brightly with a lot of small points of light :
Eight grandchildren followed, and Elenor was a constant presence in their lives. She attended all their school concerts and baked them cookies, biscuits and cinnamon rolls almost daily. She had sparkly eyes and an impish sense of humour - her strapping grandsons loved teasing her.
Hailey Bieber looks gorgeous in a sparkly dress while making an appearance on ‘The Tonight Show Starring Jimmy Fallon’ in New York City.
Pottery from West Mersea Test-Pits
Roman Spanish Amphora
Thick, pale brown fabric with a sparkly surface due to large quantities of the mineral mica being naturally present in the clay. Pots are large, torpedo-shaped jars up to 2m high, and were used to transport wine, olive oil and a sauce made of fermented fish (‘garum’) throughout the Roman Empire. 2nd - 4th century.