Originally Posted by
YYCCL3
If Qatar Airways is willing to check your bags all the way through across the tickets from Male, then you will be fine as you'll be considered a transit passenger.
Otherwise you'll need a pre departure PCR test; a quarantine hotel, and an arrival test booked for Doha. Maldives is on the red list for Qatar.
Your proposed itinerary sounds very stressful.
OP says change of airline, not change of ticket. I would assume that Qatar and BA interline.