First fo all, hope you also transfer all the music content from old MBP to the new one, as well good backup.
Hardware Need: Since MacBook Pro (2019) only has Thunderbolt 3/USB-C ports - that you will need "adapter of your choice", such as this or multi-function-hub alike, to convert to USB 2/USB 3, in order to connect the iPod cable.
Software: You have to use "finder" for managing the music.
However, under Catalina, you might have to "restore" the iPod first when you connect the iPod. With this "restore" process, you will loose the contents in the iPod. I went through this on all my iPods (classic and mini) when I connected them with Catalina. Just be prepared with this hiccup.