Currency auto-detect not working

Hi,

We have an online store at – https://sonaturalcompany.com/

Currently, we set the currency to auto-detect (Maxmind API), please refer to the attached screenshot. API correctly setup.

But when we go to the homepage, https://sonaturalcompany.com/ it shows USD despite I am in Singapore and another person is in Perth (Australia).

May I know how to resolve this issue?

Looking forward to hear from you.