Ex (wild stuff man lol)

Soo apparently this girl entered my phone and email on certain apps? Or possibly is snuck up In there somewhere. I changed every single password down to my bank account and all socials including iCloud as well. I have an iPhone 15 pro. Any way I can scan this mamma jamma for spyware or any type of crazy 😜 stuff like that? I was informed by a member of her family that she apparently told, she has done this in the past. Being a shadow login on my IG ect… appreciate any help, would give some peace of mind since I have no idea what she did on my phone.