How to save the textbox value, when the form is submitted. Since the dataset would start filter when the "Submit" is pressed.

This is the screen after submitted button was pressed.

What do you mean by “reset”. What should be in the repeater after form submission?

Before click on the submit button, the screen is like this:
The country is reset after the submit button is pressed.
Since the repeater is based on the dropdown country to do the filter.
The country is reset, however, the repeater is showing the first element in the dataset.

What I means reset, either repeater not show any records, or
the repeater showing the default value of dropdown country (dropdown1)

$w.onReady(() => {
 $w('#myDataset').onAfterSave(() => {
   $w('#reapter1').data = [];
 })
})

or use

$w.onReady(()=>{
$w("#myWixForm").onWixFormSubmitted(() => {
$w('#reapter1').data =[];
})
})