God wants them to know He is God

Exodus 7:5 And the Egyptians shall know that I am the LORD, when I stretch forth mine hand upon Egypt, and bring out the children of Israel from among them.

God is at work in Egypt. He is causing them to know that He is God. Not only is He God but He is supreme, in charge, sovereign, over all! I am the LORD!

There have always been many gods in the world. There is and has always only been One True God! Egypt believes that their god is superior. They believe that what is happening in their country is because of their gods and their goodness.

God wants to cause them to know that He is God. He is Lord.

God will work enough miracles that there will be no doubt that God is who He says that He is.

I challenge you to realize that God is exactly who He says He is. He ought not have to do anything to prove to His own that He is LORD over all!