Yes, Nokia 1 does have the wi-fi hotspot.
Yes, Nokia 1 supports Jio VoLTE.
No. Nokia 1 does not have the front camera flash.
Yes, Nokia 1 does have Google Maps support. It runs on Android 8.1 Oreo Go edition.
The Nokia 1 is an inexpensive Android smartphone, and as you can tell from the Nokia 1 review, you very much get what you pay for.