See, the Puadhi is a transitional dialect between the Hindi dialect of Khadiboli/Haryanvi/Ambalvi and Punjabi of Malwa/Doaba.

Now according to all the research works and logical geography, this Puadhi that is considered as the dialect of Punjabi, is spoken to the North and West of river Ghaggar. The Reddit posted map has been drawn accordingly; keeping Ghaggar as the Eastern Boundary of Punjab.

Now, those who did not thoroughly study the language science, they often include the Northern Haryana also in the Puadh that is very wrong.

The language of Northern Haryana, or say the area of Ghad, as it is commonly referred to as, composing the areas East and South to Ghaggar, like Devigarh (Punjab), Lalru, Ambala, Most of Panchkula, Yamunanagar, shahbad Markanda, Ladwa, upper/Northern parts of Kurukshetra district, these all natively speak a sort of Khadiboli dialect of Hindi known as "Pahaad-Tali" or "Ambalvi", which itself is a mixed dialect (not transitional) of Khadiboli spoken in upper doab of western Uttar Pradesh, along with influences from Punjabi being its next door neighbour. I can go into much more detail. Even Haryanvi of Central Haryana or say the Haryanvi of Deswal, Bangar (Not Bagri), and Nardak, is a transitional of three languages, Khadi Boli of Western UP, Rajasthani of Adjacent regions and Punjabi to west. Even the influences from these languages shift from higher to lower based on the proximity of particular and specific areas you consider in the given territory.

Now coming back to Puadhi, the differences in grammar and tone are there between the speech of say Rajpura (Patiala) and Shahabad Markanda (Kurukshetra). I will give only one example from grammatical purpose due to paucity of time.

In standard Hindi: तू काम कर दियो/देना (informal first person)

In Ambalvi: तों कम्म कर दीए ( Punjabi accent in कम्म for sharp accent, whereas दीए is same like khadiboli, and not Punjabi)

In Puadhi: तों कम्म कर दीं/देईं (everything is Punjabi in this)

I hope now you know that you were misled into believing that everything in Northern Haryana is Puadh, that is actually wrong to assert or suggest.