YES, separate itineraries require a fresh check-in of baggage on international flight and most domestic flight.
If your flights are on two separate itineraries, they are separate tickets. If they are on the same itinerary, here are some clues to confirm:
Contact the first (or each) airline and ask them if the luggage will
automatically transfer to the ...
According to Timatic:
TWOV (Transit Without Visa):
Nationals of India residing in Viet Nam
transiting through Kuala Lumpur (KUL) with a confirmed onward ticket
for a flight to a third country on Malaysia Airlines (MH) or Air Asia
(AK) within 120 hours. They must:
have a visa issued by Australia, China (People's Rep.), Chinese Taipei, ...
Indian citizens need a visa to enter or transit Canada, even if resident in the USA. (Permanent residents with a green card don't need a visa though.)
Looking up visa processing times for temporary resident visas (the category under which a Canadian transit visa exists in Canadian law) shows the processing time in the USA is currently 14 days.
It seems ...
Per TIMATIC, the database used by airlines:
Visa required, except for Passengers with a confirmed onward
air, cruise or train ticket to a third country within 24 hours can obtain an entry permit on arrival. They must have
documents required for the next destination.
In other words, since you're transiting for less than 24 hours, you do not need a ...