My iTunes cannot detect my iPhone, but other computer’s iTunes can detect my iPhone.

My iPhone Charges but the iPhone icon doesn’t appear in iTunes so I can’t sync my files

I updated my phone, updates iTunes, updated my mac, tried various Apple cables to connect it, tried different usb input, hit “Trust this computer,” powered on and off my phone and mac.

When I plug it into different computers the iPhone symbol appears

I don’t want to delete iTunes because i’m afraid my music files will delete (I am a DJ so it’s important that don’t ruin my iTunes library.)

I connected an old iPod touch and it recognizes it (icon shows and it’s able to sync)

I don’t know why this isn’t working with my iPhone?

Phone: iPhone 8 Plus (undamaged)

Computer Name:  MacBook Pro (Retina, 15-inch, Mid 2015)

Operating System:  macOS High Sierra (version 10.13.4 - 17e202)

Processor Type: 2.5 GHz Intel Core i7

Amount of RAM: 16 GB 1600 MHz DDR3

Hard Drive Size: 1TB Flash Storage (262 GB available)

Please help, thank you!!!