Consolidating iTunes DRM music from account two accounts

My girlfriend has an old iTunes/iCloud account with a lot of music she ripped from CDs she owns, and a lot of music she bought through the iTunes Store. This old music is also on an iPod classic (but she upgraded to Catalina).
A few years ago she created a new account, and has been building a library of music there too.

Looking for suggestions on getting the drm music she owns from the old account to the new account. I know this was done in the past by burning a CD, then importing, but those are bygone days.

You can always add both accounts to an icloud family setup. Gives access tot he music from the other one (I think…)

Just keep the old one around, does not eat or need clothes, so as long as it’s there you should be fine