I sometimes hear British people say "We've got ~" just like "We've got an apple", instead of " We have an apple." And I wonder if British people use "We have ~" or not. Is this phrase used in conversations in daily life?
English has two ways to say have (to own or possess) in the present tense:
I've got a car. I have a car.
The question forms for this are: Have you got a car? And: Do you have a car?
The negative forms are: I haven't got a car AND I do not have a car.
The tags are: have/has/ and do/does.
Both are used by BrE speakers and AmE speakers. I have no idea where misconceptions about all this started.
They mean exactly the same thing. Exactly.
BUT: be careful: In the present perfect tense, the British English also say have got while American English uses have gotten.
There is a famous advertisement in the US: Got Milk?
That ad means: [Have] you got milk?
There is more to be said about all this but this is where one starts.