Jamsheer K

Try this url https://site.com/wp-login.php?action=lostpassword instead of /my-account/lost-password

You can set a class as default class, then it will be added with all the widgets by default .But in case the widgets are added before setting the default class, you need to click save button for each widgets.

Regards

tnx ??

can you please let me know the issue you are facing on using developers code. I have test it and seems works fine,