Need to transfer old iTunes files to new Mac.

I was using an old Mac Pro, 2009 running 10.11.6, and my granddaughter just gave me a 2019 iMac running Sequoia 15.2. I also just updated from an old iPhone 8 to an iPhone 14.

I just noticed that I am missing lots of albums and songs on the new iMac and iPhone. I still have the albums I purchased from the music store but there is a ton of stuff that I copied over from CD's that have just disappeared.

My old Mac Pro will not start up any more but I have a clone backup. Looking inside the clone I see all my music in the iTunes folder. Is there a way I can import all those songs to my new iMac and then onto my new iPhone? This is what the folder looks like:

All my music is in the iTune Music folder. Can I just import that folder? Or maybe import the iTunes Library? That would be the easy way if I could do it. I can also drag and drop the files if needed. I'd appreciate it if anyone has any advice on how to do this.

I can no longer start up my old Mac Pro, nor can I start up from the Clone with my new iMac. The Mac Pro is just too old and incompatible with the iMac. And because of that I was also not able to use migration assistant to transfer any files. I ended up just dragging and dropping any files I needed but no apps would transfer over.

And to make matters worse the new iMac doesn't even have a CD/DVD player to transfer all the music over again if needed.

I'd appreciate any help,

Thanks,

Kevin