Booking time zone is not working

I changed the settings of my booking time zone.

Now it should set the time with the users’ time zone. but it doesn’t.

Also, the option to let users change the time zone is not working.

Please fix it.

Booking calander

What are you trying to achieve:

I want users book in their time zone

What have you already tried:

I did what the article said. and It should work based on them but it is not.