I see an oak leaf, and aspen leaf and a maple leaf in that one pic. The bark of the tree looks like maple to me.
It’s a bit out of its range in SW IA but everything is a match. THANKS.linden - https://dendro.cnre.vt.edu/dendrology/syllabus/factsheet.cfm?ID=89
Branching habit is alternate, so you know you can rule out maple . . . and ash
The buds are the clincher- big and fat ("buds are stout, ovate-acute, smooth, deep red, with two bud scales visible").
The wood is soft and very light in density, and desired for wood carving.
While not a definite ID it is frequently hit by sapsucker woodpeckers (note horizontal peck holes in pics 1,4 &5) of op.