Merging iCloud account and iTunes account

Good morning,

I have this situation:

Long time ago I created mi iTunes account and I use this account to purchase music, apps and I also have my Apple Music associated with it.

But I Aldo have an iCloud account that I use to sync mi Apple devices with 2TB iCloud Drive storage full of important files.

Mi question is: can I merge these accounts onto 1 single account?

To be clear, the iTunes and App Store account use a mail which is different from the iCloud account.

Is it possible to do that?

Thanks in advance

Samuele