The Bible doesn’t even explicitly say that Adam and Eve were the first and the only. It just says:
“So God created humankind in his image, in the image of God he created them; male and female he created them.” (Genesis 1:27)
“..but a stream would rise from the earth, and water the whole face of the ground- then the Lord God formed man from the dust of the ground..” (Genesis 2:6-7)
“The Lord God took the man and put him in the garden of Eden...” (Genesis 2:15)
“The Bible doesn’t even explicitly say that Adam and Eve were the first and the only. It just says:”
And so it is written, The first man Adam was made a living soul; the last Adam [was made] a quickening spirit.
1st Corinthians 15:45
Lets be precise now...For Adam was first formed, then Eve.
1st Timothy 2:13