How does this 不像 work?
門口不像日本有隔出玄關範圍的高低差

Some object is omitted

(這)[門口] [不像日本(的門口)(那樣)] [有] [隔出玄關範圍的][高低差]


(This)[door], [unlike Japan('s doors) (which)] [have] [that separate the entrance area ][height difference]


This door, unlike Japanese doors which have a height difference that separates the entrance area


It implies 這門口沒有高低差 (this door has no height difference)

Break down the sentence by topics and comments:

[這門口] [不像日本門口那樣有高低差]


[不像日本門口那樣有高低差] is the comment on the topic [這門口]

Modify the comment sentence 不像日本門口那樣有高低差:

不像日本門口那樣有高低差 --&gt; 不像日本門口那樣有[隔出玄關範圍的]高低差

[隔出玄關範圍的] is an adjectival phrase that modifies the noun 高低差