Those are often done with external lenses, they're composites of multiple shots, and/or have had a ridiculous amount of post processing work done to look good.

And of course they're done with studio lighting. Huawei has been caught at least twice using DSLR shots as phone pictures as well. Samsung was caught once.

https://fstoppers.com/originals/can-you-really-claim-it-was-...