Iphone connection to macbook

I Have similar issue, when I connect my iPhone 11 into my Mac (Catalina, already updated). My Mac can’t see content, I call also Apple support, they recommend Apple brand Cable. Done, but same thing, can’t see iTunes or do iTunes backup (music now, not iTunes). Here is picture how it looks like. Anybody know how to fix this issue. All online help are tested, but is there something what I missed. Devices are both restarted. Permission is resented on phone and approved. Thanks about any help.

Okay, so you are trying to connect the iPhone to the computer to utilize iTunes. Do you have the latest update to iTunes? Are you still using Mojave? Check for updates to iTunes and Mojave. There was a security update not too long ago for Mojave. Otherwise, if you have one of the newer iPhones, you don't indicate what you have, you may experience a problem if you don't update. Can you provide a screenshot of the message box?

To connect to the iPhone to do what? You can connect the iPhone to the computer to do a number of things if you still have Mojave.

If you are using Catalina, you will not see iTunes. See this, What happened to iTunes? - Apple Support

Try this, If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support

Idk why, but it’s not working, even after reset with those instructions. Even that restore button (see picture) doing nothing... so what’s wrong with my phone? Or where is the problem?