If you read Indian History, It was pretty clear Muslims were the most powerful political force in the countryduring middle ages, however, most muslim rulers were turks as such did not want to impose Islam rather Make a fortune using Jizya, If India was lets say was conquered by the arabs in the Umayyad campaigns in India if Chalukya and Gurjara-Pratihara did not form an alliance, effectively makeing the whole of Indo Gangetic Plain as well as Western India Islamic
Well, conquering the whole Indo-Gangetic Plain would really stretch Umayyad logistics, so it would probably dissolve into a series of loosely Umayyad-affiliated polities, or face significant rebellions within a few years after the conquest. With an Umayyad POD, Turkic rulers would probably still become prevalent in India, as the Umayyad policies on non-Arab Muslims made the Abbasid Revolution mostly inevitable, and Abbasid policies on recruiting ghilman troops are what led to Turkic dynasties predominating in their former lands.
The post-Abbasid Ghaznavids, with their effective and adaptable army, could finalize the conquest of the Indo-Gangetic Plain that the Umayyads would have started, and then the succeeding Ghurids (although they probably wouldn't exist in the same form), instead of being the first to conquer the Ganges would already control it as their main powerbase. If the Ghurids have similar successes they could conquer into the Deccan Plateau and Bengal, forming a Delhi Sultanate analogue earlier on. Maybe opening it up for the Seljuks (because why not?) to settle in as the first Turkic Deccan Sultanate.