Intermittent touch issues, buttons and text fields not working in some apps

I have a 13 Mini. For a while my phone has been slow to respond to touch. It’s suddenly worse, some apps I need to use (like for work) are difficult to use because I can’t press a button, like nothing happens no matter what. I’ve force restarted and uninstalled/reinstalled my apps. iOS is updated. I really don’t want to buy a new phone but it’s getting almost unbearable. I never know what button or text field won’t suddenly not work. Any suggestions?