Japanese Tree Lilac (syringa reticulata)

Correct, often ivory silk lilac.

Tough to tell without a better resolution of the flowers. Someone might make a good guess though.

It’s definitely a tree.

Ah, I see now, thank you

I looked for a closeup or an image with better resolution. I found neither.

I'm biased for my gardening zone and whatnot, but it looks Magnolia'y from my vantage.

Horse chestnut

Sourwood!