In the ancient Near East when a child was adopted who was still nursing, a wet-nurse would be hired until the child was weaned. This serves a the background of Moses' mother being hired as a wet-nurse for baby Moses (Exod 2:7- 10). https://www.howthebiblefitstogether.org/files/Exod-2.1-10b-Moses'-Mother-as-Wet-Nurse.pdf
A series of twenty events beginning with the births of the first and second Moses are identical in character and order: https://www.howthebiblefitstogether.org/files/Exod-Revb-How-Bible-Fits-Together.pdf
A chiasm is a literary structure where the words or themes of the first section of a passage are repeated in reverse order in the second. Typically whatever is in the center of the chiasm is what is being emphasized. In Exodus 23:20-23, the emphasis is on obeying God's voice (Exod 23:21-22). https://www.howthebiblefitstogether.org/files/Exod-23.20-23a-Chiasm.pdf