Music

Personally, I use SFTP to move files between phone and server. I can imagine there are SFTP client for iPhone then install openssh-server in Ubuntu then connect as you expect. Use your Ubuntu username and password to authenticate

There is this too
https://askubuntu.com/questions/799414/how-to-move-files-from-ubuntu-to-iphone#820909

I don't use Apple stuff myself. My Android phone shows as a USB HDD when I connect it. So much easier than Apple's idea

thanks, it's really much easier with android, but i'm already used to ios.

Yeah unfortunately Apple doesn't play well with others. Try the link but SFTP will definately work/. Transfer will go over WiFi too so you can walk around while the transfer takes place. If you port forward 22/TCP from your router to the same system then you will be able to securely access your files from anywhere you have an internet connection.

Alternatively you could sync using cloud storage or even setup an openCloud server if you wanted.

Alternatively, you can use ifuse command to mount an iPhone as a drive while it's plugged into your computer's USB port.
https://www.addictivetips.com/ubuntu-linux-tips/access-photos-videos-on-your-iphone-on-linux/

Yes, Apple is very user-friendly, but doesn't work very well with other systems. Of course, you can use online services with music, but if you upload music from your computer, you can try cloud services. On the other hand, https://cashloansnearby.com/ohio/parma/ has collected cash loans near you, so if necessary, you can simply replace your Android phone.