You should think carefully about what personal information you share online. For example, are you easy to find via search engines? If so, you should try to remove this data.
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Specialized agencies and data brokers collect public information and information from data leaks about you and sell it on to intelligence agencies, for example. Companies such as PimEyes, which specialize in facial recognition, use your personal images to train their AIs. This captures the biometric features of your face and you can be identified in other images in a fraction of a second. Try to find yourself on the internet, identify the services and try to remove your personal data from them. For example, use Google Alerts to be automatically informed via email as soon as your name or other personal data appears on the internet. You can also sometimes use DMCA takedown requests to have your data removed from US websites.