Any tips for “child proofing” a parent prone to romance scams?

My dad has been repeatedly falling for these romance scammers and sending photos of these “women” claiming to be in love with him. He’s the perfect target — single, lonely, craving companionship, etc.

I’ve tried many times to explain how sophisticated and how far these scammers will go to steal your money, but he won’t listen. After telling him that the “investment” website he was trying to create an account for was clearly a scheme, I saw him he go off to try to confront the scammer for a shot at redemption via text discretely thinking wouldn’t know.

He hasn’t been tech savvy enough to produce any financial information, but he did ask me to help him set up Zelle for an unknown reason, which I refused, and now recently downloaded an app to remit money overseas.

He did claim he’s met this “person” in real life years ago, but I think that was a made up lie. He says they’ve even FaceTimed, which throws me off a bit, because I don’t recall these scammers ever showing up on video, or has that changed?

I don’t live with him and see him everyday so it’s virtually impossible to monitor him but I do have access to his emails. He constantly gets scam emails that won’t go away, even after blocking and filtering them, so I assume he’s giving his email addresses out generously to these people.

Any tips on what I can do or effective child proof ways of locking his phone?