Maciamo, this is what I've observed so far when it comes to Polish DNA Land results.
First let's take a look at regions:
Current version:
https://www.eupedia.com/images/design/Poland_regional_DNA_project.png
Possible update:
https://i.imgur.com/SgsPDFM.png
Here is how I group them:
Western Poles = Kashubia, Northern Poland, Greater Poland and Upper Silesia
Central & South Poles = West Masovia, Central Poland, Lesser Poland & West Mountains
North-East Poles = Sudovia-Podlachia, the rest of Masovia and Warmia-Masuria
*
South-East Poles = Red Ruthenia, Eastern Mountains and possibly Lublin Land
*Unless mixed with Germans, which is very probable for Warmia-Masuria.
Now here is how they score in DNA Land, when it comes to "North Slavic":
Western Poles score about
45-70% North Slavic (it is possible that some get less than 45%)
Central & South Poles score
60-80% North Slavic, the rest North-West Euro and some South Euro
North-Eastern Poles score
70-90% North Slavic (it is possible that some can get over 90%)
South-Eastern Poles score
50-85% North Slavic, the rest mostly South Euro (especially Balkan)
Now as for other admixtures:
South-East Poles score a lot of Southern Euro (usually Balkan but can be even SW Euro).
North-West Poles (especially Kashubians) usually score 0% Southern European, 0% Balkan.
Balkan - or South Euro in general - admixture is highest in South-East Poland, then declines as you go north and west. Upper Silesians and Western Lesser Poles still get as much as 15-20% Balkan or other Southern Euro (including Iberian, Italian, Med Islander). The rest is split between North Slavic and NW Euro.
Greater Poland gets 8% to 16% (average probably 10-12%) Southern Euro (Balkan, Med Islander, SW, SC, etc.).
Kashubians, as I said, usually get 0% of Southern Euro (I suppose in Northern Poland it is from 5% to 10%).
In South-East Poland, some people can score even 30% up to 40% Balkan, twice as much as in Upper Silesia.
South-East Poland usually gets North Slavic (50-85%), Balkan (up to 30-40%) and some Western (SW or NW).
Sudovia (northern portion of Sudovia-Podlachia) likely gets 85-90% North Slavic, the rest South & West.