بسم الله الرحمن الرحيم
The rennet obtained from an animal slaughtered by a non-Muslim or Muslim in accordance with Islamic law or contrary to it, is in all cases Jaiz as long as the animal in question is not a pig. This is the opinion of Imam Abu Hanifah.
And Allah knows best
20 ٍRabiul Akhar 144/ 06 December 2020