I lost my iPhone 12 mini and Find My was disabled on that iPhone.

I lost my iPhone 12 mini and after few hours I lost it, 'Find My' for my iPhone was disabled. I guess the password for my iPhone was unlocked by someone who got that. I don't know how he could manage that, but I received an email that my iPhone was disabled in 'Find My'.

So not only I cannot keep track of my iPhone location anymore with 'Find My' app, but also my iPhone is totally deleted from the device list in 'Find My' app anylonger.

Now I gave up getting my iPhone back but I'm still worried about the all the personal data that I had in my iPhone hardware.

I assume that if he or she just turned off the Find My function in my iPhone, I think I can still see my iPhone from the list of device in 'Find My' app. But since I cannot see my iPhone in the list, I guess my apple account was totally deleted in my iPhone.

If my understanding is correct, is there any way I can handle this situation, such as deleting the data in my iPhone remotely by contacting Apple service center or something?

Or don't I need to be worried about the datas in the phone, because if my account is deleted from the phone all the datas are not accessible?

Please help.