Hi Kalp Shaha,
Create power automate using trigger 'When an HTTP request is received'

and on change of your column write similar code.
var flowUrl = "flow URL";
var input = JSON.stringify({//If you any parameters defined in your power automate than used line number 4 to 7, otherwise remove it.
"argument 1",
"argument 2"
});
var req = new XMLHttpRequest();
req.open("POST", flowUrl, true);
req.setRequestHeader('Content-Type', 'application/json');
req.send(input);//input is passed when you need it.

Let me know if I can provide more details.
Thanks
Regards,
Abdul Wahab
Power Platform/Customer Engagement Developer/Lead/Solution Architecture/Project Manager
Direct/WhatsApp: 923323281237
E-mail: abdulwahabubit@outlook.com
Skype: abdul.wahabubit