Hi @Jake Sokol
You can navigate to edge://settings/passwords, in the Saved passwords section, click the three dot button after the saved password, and click Edit to check if the site url is correct for the saved password. If the password information is not correct, you can delete the saved passwords and resave them next time you login the websites.
Sometimes, even if the saved passwords information are correct, it will occur the issue not auto filling password. In this situation, you can delete all saved passwords from all time, then resave them next time you login the websites. After that, I think the password auto filling function will work then.
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Regards,
Yu Zhou