You can also use Wikipedia:
https://en.wikipedia.org/wiki/Fruit_salad
Canva is good for its free images. Just make sure that all the images you created the collage with are free. Since Canva also has premium images for its Pro Members, your reader can't tell whether the images are free to use. If you're changing the images to make a collage in Canva, you need to indicate they images are free. All images have links to them in Canva.
Hmm, maybe for fruit salad but there's no strips of young coconut fruit in there so it can't be called buko salad. 😊
See my answer for the Canva collage you created. Good you found an alternative.