Form button not comeing center

[Tech_wizard]

there the new Form Editor We can't make the button center or left So can Help me in there Custom CSS also not Working in there external pages and Hubspot page also 
<style>
.hsfc-NavigationRow__Buttons:has(>:only-child){
justify-content: center !important;
}
</style>

[Aakar]

@Tech_wizard - Cannot say anything without looking at the page. Can you share the page URL?