i need help with encouraging pop migration on stellaris 4.0 since ui does not provide detail for both migration push/pull and now stuck with low growth due to pops not reaching logistics threshold

i also troubled with the way growth required ceiling variable works now. since 3.14 pop rely on filling up to certain value to grow thus can see the number clearly but with parallel growth of pop group in 4.0 the number is hidden, should i be concern with it?