There are several ux reserach methods. You need to know them as an UX Designer and use them.
Individual in Depth Interview
Net Promoter Score
Measuring traffic and actions on the website.
Analysis of the conversion funnel
Interviews based on the Testing Scenario
Remote research with users
As you can see there are many Ux research methods. You don’t need to use them all. You should know them and choose the better one for your use case.