Older parent and romance scams/ what are my options

For the past 6 yrs (since the death of my mother) my father has been involved in romance scams. I’ve told him they were scams, he swore he wouldn’t send money, and I let it go. He’s very lonely and has refused my attempts at finding him real in person communities. His world has become so small now that texting women and running simple errands is all he can really handle in life. I do invite him to my kids’ activities and he usually refuses. He’s also very rigid and difficult and generally not a lot of fun to be around.

I did speak to his financial adviser about my concerns and she told me she was trained in this and he couldn’t move large amounts of money around without her knowledge and involvement.

I’m currently on vacation with him and he left his email open and I saw a suspicious one about a money transfer. I’ve searched his email and saw that he’s been sending someone about $700-$900 at least four times.

So now this has moved from a terrible messed up habit into something else. I know it’s slippery slope and $700 today could be $17000 tomorrow. My father also has millions and very good long term health insurance. He spends next to nothing on himself. So these scams probably won’t ruin him anytime soon.

I also know these scams are an addiction and me staging some intervention probably won’t work if he has nothing else to combat his loneliness.

I’m looking for advice on what to do. I will speak to his financial adviser again now that I know he’s sending money, but I keep coming back to the fact that texting people is his only form of entertainment. I know it’s messed up, but I can see how it’s impossible for him to substitute romance scams with something more productive, like volunteering at a soup kitchen. He’s also very arrogant and thinks he’s above and better than women his own age.

Thank you!