This fruit is from the same tree that my other photos of Morus alba are from. It was identified for me on iNaturalist as the invasive Morus alba. From my understanding this is most likely the variety Morus alba tartarica (Russian Mulberry), which is more likely to have mature fruit that turn black. It looks like on garden.org there isn't a separate page for this variety though, and it's listed as a synonym for Morus alba (shown as Morus alba f. tatarica Synonym)? From what I've read you can differentiate Morus alba from Morus rubra by looking at the the top and bottom texture of the leaves. Morus alba leaves are glossy on top and not fuzzy on the underside. The fruit color and leaf shape are very variable. I believe the Morus rubra fruit are also usually longer.
https://www.invasive.org/alien...
https://www.illinoiswildflower...
