No, it does not have a swimming function with counting of laps completed. The properties indicate activities such as cycling, hiking, fitness and running, but do not specify pool swimming tracking. The official data confirm support for swimming in the pool, but without lap counting.
The watch is water-resistant with a protection class of 5 ATM, which means that it is water-resistant to a depth of 50 metres and is therefore suitable for everyday use, swimming and similar activities. This specification corresponds to a water resistance of up to 5 bar.
The Redmi Watch 5 Lite can make and answer calls, but it does not specifically support receiving WhatsApp calls directly. However, it can receive notifications from WhatsApp, allowing you to stay informed about messages. For actual WhatsApp calls, you would need to use your phone.
The Redmi Watch 5 Lite offers the blood pressure measurement function. There are no specific differences in the health functions between the different colour models. Blood pressure measurement is part of the health functions that are generally specified for the device.
I can't answer the question about the alarm clock. Notifications are displayed. Can be controlled individually if required. Calls are displayed and calls can be answered/confirmed using the watch (if the Bluetooth connection is established).