1. Brick walls on both sides can be directly removed without bricklaying above the gate. There is no wall cutter, so it is better to find a plumber to cut the tiles of the external wall and then find a handyman to remove them, otherwise the tiles of the external wall will be broken when the wall is removed, which is very troublesome to repair.
2. If there is a brick above the gate, there must be a beam on it, and the beam support is generally around 10cm. Removing this wall will cause the beams to lose their support and collapse. Need to redo the beam to make the upper brick body firm, it is best to find a plumber.