Elementor forms can easily be adjusted to display form fields in 2 or more horizontal columns, using the built-in Column Width option. Fields are set to 100% column width by default, but you can select a different width for each field, from 20% to 100%.
Content
Form Fields
- Go to Content > Form Fields and Select a field that needs a different width
- Column Width: Select a width, choosing from 20% to 100%
Tip: You can change the width of the Submit button in the same way.
Note: Click the Column Width’s mobile editing icon 
to choose different widths for mobile and tablet as well.
Learn more about the Form Widget (Pro)