Does the Fenix 7 have a smart alarm?

It does not

any other other watch in market have this feature?

The watch comparison site is misleading by writing that the Fenix 7X has a "smart alarm"

all watches that have this function also include Fenix ​​7X

versus.com/en/smartwatch?filter[]=smart_alarm=true

Thanks to this website, I found out that Garmin also created models that can be used to make phone calls

No, it doesn't - either way it makes no difference. How do you expect a so-called "smart alarm" to work, or.. sorry, be smart, without using at least a microphone? smartphone apps such as Sleep Cycle do a much better job at waking you up at appropriate time than gimmicky smartwatch smart alarms.