Of course, even ATtiny1614 can.
Since the load capacity is built-in, there is no need to connect a capacitor.
Only requires a 32.768kHz crystal. Connect to PB2 and PB3.
It must be placed in the immediate vicinity of the microcontroller and not intersect with other traces.
The code is not written for a relatively new AVR like the ATtiny1614 and cannot be used as it is.
A another code is required when using an asynchronous RTC with an external crystal on the ATtiny1614.