From the screenshot you shared, it looks like your lead form on mobile is either misaligned, zoomed out, or showing overlapping UI elements. This often happens due to mobile responsiveness issues or meta ad preview scaling quirks. Here's a breakdown of what could be wrong and how to fix it:
Possible Issues & Fixes
1. Improper Mobile Styling
If your form is built inside a landing page (not native lead form):
Check viewport settings in your page builder. It should have a <meta name="viewport" content="width=device-width, initial-scale=1"> tag.
Use mobile preview in your builder (like Webflow, WordPress, ClickFunnels) and adjust paddings/margins accordingly.
2. Image or Background Scaling Issues
Your image/banner may be too wide or not scaling for mobile.
3. Form Fields Not Stacking Vertically
On mobile, form fields should stack vertically, not stay side-by-side.
4. Meta Native Lead Form Preview Bug
If you're using Meta's Instant Form, sometimes the preview inside the Ads Manager looks broken, but:
It renders properly in actual mobile apps.
Still, test it on a real mobile device via link sharing or test campaign before going live.
What You Can Do Now
Test on real mobile device, not just preview.
Use Facebook Ads Creative Hub to preview and troubleshoot mobile formats.
If it's a third-party landing page, test using Chrome's Inspect > Mobile View.
Optimize form fields and font sizes specifically for mobile — no small clickable elements!