Israel was not in Egypt 430 years...that is presumed from mis-understanding of the Hebrew but proven from Scripture that the promise itself was given to Abraham at age 70, 430 years before Israel left Egypt.
Gal 3:17 And this I say, [that] the covenant, that was confirmed before of God in Christ, the law, which was four hundred and thirty years after, cannot disannul, that it should make the promise of none effect.
Abraham was 70 when he received the promise.
Isaac was born 30 years later
+ 60 years for Jacob's birth
+ Jacob entered Egypt when he was 130
Jochebed, Moses mother born to Levi at the gates of Egypt
Moses born 128 years later, to Jochebed, daughter of Levi
Israel departs Egypt when Moses was 82 years old.
30+ 60+130 = 220 years from promise to entry into Egypt.
Jochebed born to Levi at gates of Egypt and she marries her nephew, Levi's grandson
They have Moses when she is 128 years old
220 =128 =348 years since the promise but only 128 years in Egypt, and most of those were in prosperity, until Joseph died and another Pharaoh arose who did not know Joseph, and gradually, their lives were made "bitter" which is why Miri -am was named "bitter people".
Moses led Israel out 82 years after his birth, so from the promise to the "Law" was 430 years,
and Israel was in Egypt 210 years.