Please check the following.
There is a place to collect water called traps in the drainage area around the water, and it has a function to prevent invasion of odors and pests from the sewer pipe.
It may smell from the drainage by water evaporation in the basket if you do not stay home for a long time, so please fill more water in the basket and change air in your room.
The kitchen drainage basket also has a role to reduce odor. If you remove it, it may cause odor. Please use it in the installed state.