While i'm not a fan of Yoshi's New Island, that game does feature some gorgeous artwork, so here's a Lora attempt at mimicking it's style, not perfect since there isn't a lot of it, and even what we have it's still pretty simple, but it worked well enough for me.
Have fun with it.
Check it out on CivitAI: https://civitai.com/models/1409227?modelVersionId=1593030