From late 18th century to 1918, wies/village Sielnica was hamlet size.The filial Greek Catholic Church was in Pawlokoma and the filial Roman Catholic Church was in Dylagowa.Przemysl was the powiat/county and Dubiecko was the gmina/judicial-tax district> Galicia Province > administered by ethnic Poles for the Austro-Hungarian Empire. During the Interwar Period Western Galicia became a part of Reconstituted Poland, which technically had not existed for the previous 125+ yrs.
Today this is Podkarpatskie wojiwodstwo/region in SE Poland.
Pawlokoma was a place of great tragedy in 1945 and GC Church Registers were destroyed by the Poles. The residence that survived the massacre in Pawlokoma, were resettled to SSR Ukraine.
Agie, I do know someone in Lviv, but won't be available until end of summer, that has contact w/leaders of resettled Ukrainians from your ancestral village, and can make an inquiry re any surviving family and where they may have landed up.