No. Elderberry has compound opposite leaves.

https://www.minnesotawildflowers.info/shrub/common-elderberry

click on leaves and stems to view.

Any idea what this is then?

So far it looks like a Japanese cherry - you should show closer views

I also think cherry, but I cannot see the leaves clearly enough to ID any more.

Makes sense as I do have a number of weeping cherries. Thanks!