@kanha123_456
First inspect your target element using F12 in your browser and right click your click(In this example its input textbox), then click "Copy JS Path".

Now go to console and paste the copied element details in console window like below and in the end add ".value" as mentioned in the screenshot.

Now its entered text through javascript.Now you can copy and paste the same script in power automate desktop.
Hope you already launch browser and configured all the parameters and flow is successfully launching your website. now add "Run javascript on webpage" and place the javascript inside the tag.
function execute{
your javascript here
}
Thanks,
Deenuji Loganathan 👩💻
Automation Evangelist 🤖
Follow me on LinkedIn 👥
-------------------------------------------------------------------------------------------------------------
If I've helped solve your query, kindly mark my response as the solution ✔ and give it a thumbs up!👍 Your feedback supports future seekers 🚀