No it's not. The bulk of the workforce of these Muslim empires came from what is now Pakistan and north-west India, and even those that didn't still assimilated into our population.
https://www.harappadna.org/2012/05/harappaworld-admixture/
This is the Harappa admixture sheet. You will find that Muslims from Pakistan and north-west India have higher amounts of SW Asian (i.e Arab) ancestry than their non-Muslim counterparts from the same ethnic group. The only exceptions are a few of the Sikh populations, which would be expected since many Muslims did convert to Sikhism (since Islam was already pretty firmly established in the Punjab at that time).
I'll give you some examples:
Kashmiri Paharis (overwhelmingly Muslim): 2% SW Asian admixture
Kashmiri Pandits (overwhelmingly not Muslim): 0% SW Asian admixture
Punjabi Arains (overwhelmingly Muslim): 2% SW Asian admixture
Punjabi Muslim Jatts: 2% SW Asian admixture
Punjabi Brahmins: 0% SW Asian admixture
Gujarati Muslims: 4% SW Asian admixture
Gujarati Patels (overwhelmingly not Muslim): 0% SW Asian admixture
Here is a Punjabi Muslim Gujjar's ancestry results, he obtained 3% SW Asian admixture:
https://anthrogenica.com/showthread.php?12411-Pakistani-Gujjar-Results-Harappa
Here are some studies on Muslim Gujjars from north-western India, they are shown to be genetically and physically distinct from their non-Muslim counterparts:
https://www.ncbi.nlm.nih.gov/pubmed/3163234
https://www.ncbi.nlm.nih.gov/pubmed/3812661
https://www.ncbi.nlm.nih.gov/pubmed/14524001