I selected the Radio button in my form and make it a required field but when I test the Form on LP the Validation of the message is not coming even I tried custom validation but when I approve and close it, again it changed to Standard validation Message.
Can someone please help me here?
Can you please share the LP URL so we can have a look?
Also, if you've added this form on the Marketo LP via the form element, I hope you'd have approved the LP as well after the approving the form.
Might be there some scripting or loading issue, please check your assets again.
Are you able to post a link to a live page that's using this form?
If it's a Marketo LP, the LP needs to be reapproved each time you update and approve the form.
If it's an embedded form, there's sometimes up to a 5 min delay before the new version of the form shows up on the page.
If you've approved the LP or waited 5 min for the webpage to update w/ the new form, it'd be easiest to troubleshoot this from a link to a live page.