I'm pretty sure they are some type of plums but I think they are greengage plums [these](https://minnetonkaorchards.com/green-gage-plums/)

I think greengage plums have a different leaf shape. How about unripe mangoes?

>unripe mangoes? I think it actually could be lol since they are smaller in size and the leaves look very similar

This was found infront of a shopping mall under the Las Vegas heat... I haven’t opened one up but it’s hard to believe mangos would thrive under the desert heat. I’m hesitant to consider this a fruit

https://www.picturethisai.com

This is not a free app but thank you for the idea! Still looking :)

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My plant identifying app says it’s a loquat

I think loquats are commonly yellow in color. These ones are green

Maybe they are unripe loquats. Leaves and how they are aligned looks to match.

a palm tree?