The real problem with evolution and the 6 days controversy is NOT in Genesis.
The real problem is later in Exodus when God makes it very clear: For in six days the Lord made heaven and earth, and the sea, and all things that are in them, and rested on the seventh day: therefore the Lord blessed the seventh day, and sanctified it. Ex 20:10
And then of course: Romans 3:4 Let God be true, and every man a liar. As it is written: “So that you may be proved right when you speak and prevail when you judge.”
To me, that 6 days means just what it says: 6 24 hour rotations of the Earth, Days!
By faith we understand that the worlds were prepared by the word of God, so that what is seen was not made out of things which are visible. Faith is the EVIDENCE of things Not seen......Heb 11
By the word of the LORD the heavens were made, And by the breath of His mouth all their host. ......For He spoke, and it was done;.. He commanded, and it stood fast..........Psl 33:6/Psl 33:9
All things came into being through Him, and apart from Him nothing came into being that has come into being... John1:3
Why "through faith"?...... Because "the things that are seen were not made of things which do appear.".... For this is Faith......
"True faith drops its letter in the post-office box, and lets it go. Distrust holds on to a corner of it, and wonders that the answer never comes". ..A.B. Simpson