Troubleshooting Ad Conversion Drops After Website Migration

Hi everyone, My company (a healthcare startup) is currently facing an issue with ad conversions. According to my manager, after we migrated our website from WordPress to Webflow, the number of ad conversions dropped significantly also but not sure where is the leak. Where would you start investigating first in a case like this? Also, if you have any recommendations for tools (e.g., for analysis or conversion tracking), I’d really appreciate it. Would love to book a quick call if you are open to it. Thanks a lot!