A Nigerian chief, Mr. Chen, the general manager of Guangzhou International Technology Co., Ltd., went to China to study. Seeing the Chinese house, the interior decoration is particularly beautiful! Special attention to interior decoration materials.
Compared:
Nigerian ceilings are made of POP plasterboard or pvc --pk --- China uses aluminum gussets
Nigeria Wall--painting wall paint, -pk --- China Integrated Instant Installation Fiberboard ( 3IF )
  Nigeria Interior doors - mostly iron doors - China uses ECOLOGICAL DOOR
and many more....

Because interior designers, and builders in general lack innovations. Only a few of them follow contemporary rules with regards to building designs, interior decorations, landscaping etc.

1) Lack of innovation.
2) Lack of exposure.
3) Lack of motivation.
4) Lack of international competition.
5) Finance.

You’re right, Nigeria doesn’t have a brand

seunfly:
1) Lack of innovation.
2) Lack of exposure.
3) Lack of motivation.
4) Lack of international competition.
5) Finance.