What changed the war in Ukrainian migrations to Poland [subcast GRAPE. Pressed from data]

Two years ago, on the day of the war, did the large migration from Ukraine to Poland begin? Do we know how many Ukrainians have arrived and how many are left in Poland? Are these statistic pressed from the data, or are they fortunes from the furrows? How did the nature of migration from Poland and Poland change? And do Ukrainians take jobs from Poles?