This map shows a potential outcome...with Russia, Poland, Hungary, and Romania each taking historical lands back from Ukraine.
The map is bull.
Neither Poland nor Romania have any intentions - at the governmental or at the people’s level - to be like Putin and grab territory like a thief.
Poland in particular does not want the area you have falsely mapped out. The reason is - The Polish government in the 1990s categorically stated that they recognized their eastern borders as permanent - just as their western borders with Germany and Czechia are permanent.
Even Konfederacja see that region is currently completely populated by Ukrainians. In the inter-war years it was a mixed population with more Ukrainians than Poles except in Lwow/Lviv. Pre-1914 it was again mainly “Poles” in Lwow, Jews in the shtetls and smaller cities and Rusyni as peasants. The national identities were fluid - if you were Roman Catholic you were “Polish” and if you were Greco-Catholic or Eastern Orthodox you were “Ruthenian/Rusyni”.
Current-day Eastern Ukraine is the same - lots of Russian speakers - like Zelenskyy himself - consider themselves Ukrainians.