When we are adding a Car for Normal/Transfer there is no option to select date to make it unavailable. That is a mandatory feature for any car rental otherwise a user can just book a car at whatever date and time they wish. The whole car rental feature is useless without that functionality.

By default any date and time is available to pick. Please help me to disable the time from the calendar so that I can use the car transfer feature?

Also I have seen some one feedback from 2022 where they has asked for a bike option as well as car which I totally agree as bike and car goes together in rental specially in Asia. As a product manager myself I would like to help you out design these features if you agree to develop. (Then you can also add versions of template which only focuses on bike or car rental services other then hotel booking services, etc.)