Yes the Bible explicitly and directly states God is a singular person who created alone. Can't miss it. Actually it says this repeatedly, but to keep this concise and to the point I will begin with one example.
God referred to Himself as an I, not a we or us, meaning God identifies Himself as as singular person, not a group who created together, but someone who created alone.
Isaiah 44
24Thus says the LORD,
your Redeemer who formed you from the womb:
“I am the LORD,
who has made all things,
who alone stretched out the heavens,
who by Myself spread out the earth,