Try getting a muddy / grubby toddler clean in a shower. A bath ( or large kitchen sink ) is essential.But walk-in showers are becoming a big selling point,
Standard wet roomespecially those with no tray and the floor all as one.
Can be done. and being a flat probably explains you need to have a combiI could not have one of those in being a flat.
My bath room has a "wet room" corner for the shower and a bath for the relaxation time ( and washing grand children )
The shower "tray" ( 80 cm by 80 cm ) its surround ( 100 cm by 120 cm ) and one wall are a DIY fabrication using ABS sheet. the tray and the surround and is sunk into the new oak floor that is suspended 7 cm above the ancient oak floor.
Taken before the final decoration was completed