Well, not exactly zero.
The scientific evidence for an old earth is overwhelming.
Concordists look for a way to interpret Scripture in light of this.
Galileo observed the rotation of the planets and the physical evidence was instrumental in pointing out a better way to understand Scripture.
I’m an old earth creationist.
John Walton’s book, The Lost World of Genesis One changed the way I interpret the opening chapters of Genesis. Walton interprets the seven days of creation as seven days but with subtitle differences of focus on what really happened during each day.
His understanding separates the Scriptures from science.
I’ve read countless books on the topic of Genesis and science. It wasn’t until I read Walton’s book that I felt truly at rest with the topic. I’d encourage you to read it!
Rob
I see the 7 days beginning with Genesis 1:3. Genesis 1:1 the original
ex nihilo act by God (John 1:3).
Genesis 1:2 the state of the earth before day 1.
That the first day God caused the Sun to become the star that it is.
That day four the debris was blown away to allow the Sun and Moon along with the stars in the night sky to be distinct lights as stated.
Whether God created in Genesis 1:1 -- 6,000 years ago or 13.7 billion years ago or longer need not negate the 6 days of acts of God and God resting on the 7th being Earth days.
Now the geological ages and the dating of the flood is a separate issue. Noah being tenth of Adam. Now as for as the rest of the geneologies prior to Abraham, there is where tnere may be a big issue. The added name in the Greek NT in Luke's account, suggests that the Genealogy may not be contiguous as given. Also that some of the Hebrew names are plural. The evidence needs study.