On the checkout page, the billing detail form and the order form are underneath each other. It should be side by side. In the 7.5.1 update, there was this fix, but it didn’t work. You suggested editing with CSS in a different thread, but the css code didn’t work either.
Sorry to say, I am not able to log in or access the WP backend because you have activated the maintenance mode and the WP admin login URL redirects me to the maintenance page.
Please update the new version of the theme “WOODMART WordPress NEW: 7.5.1RELEASED” and update the required plugin and check the issue.
Hope your issue will be resolved!
Or you can add this custom css code in theme settings > custom, css to fix the problem.