I feel so, hindus and sikhs of KPK/Afghanistan look like local pashtoons, don’t know about sikhism but one cannot convert to Hindu dharm, one has to be born a hindu. So I feel that they might be hindus once, but again I’m not at all sure about it.
Kuch bhi.
Your ancestors and mine were all "converted" to Hinduism while they probably were dressed in animal skins or grass skirts
and worshipping le nature spirits some 3-4k years back.
In terms of exports :- Sometime during the muscular expansion period of the Cholans, they managed to convert the tribals of modern Indonesia and Malaysia and Indo-China( Cambodia wagera ), so much so that they had their own varna system and Hindu kings, the actual conversion was done by the brahmin pandits sent over.
In terms of more recent time :- Around 200 years back, a certain big brain Bengali Pandit went to what is modern day Manipur and converted the King there, and with him all the praja of meteis( what we call manipuris ) also converted by their raja.
The conversion was such a roaring success, the raja immediately started producing new genealogies where he is the descendant of Arjun of the Mahabharat, The Raja also dumped the meitei script that they used to write in and switched to the Bengali script
Based Bengali, otherwise Meiteis would also be in some secessionist insurgency that is unquenchable because of the religious angle, why do you think all the non-Hindu tribes there are converted to various flavors of Christianity?