You can do this with the P30lite, if you select the photo in the internal memory folder, there is a function called "Other storage location" where you can choose to transfer it to your memory card.
Everything is still the same with this device. Including Google Services and everything that goes with it.
So far, no device has been delivered with Huawei OS.
However, there are devices (e.g. P40) that do not have Google Services but Huawei Services. But Android is still installed on these devices. Just without Google.
That's just an advertising slogan. The camera is certainly not bad for everyday use, but it is far from flagship quality and therefore certainly not a photo miracle😅.