Anglicanism? if it exisited in even the most miniscule form anywhere in Poland, it was super marginal, jultra-anecdotal and hyper-peripheral, countable on the fingers of one hand
Quite popular before the war in Bialystok, especially among Jewish people who converted.
What Pole would want to have anything to do with a religion concocted by a serial wife-killer?
Or for that matter with one led in the same period by a pope who married his own niece and another who poisoned his son.
That's veering off topic though. It is however relevant to the OP that people did convert and for various personal reasons..