You can use one Apple ID for media and app purchases and another for email, contacts, calendars, and messaging.
1. In Mail if you want to use a different iCloud account. Settings -> mail -> accounts -> add account -> iCloud
2. Messages and Facetime. Sign into a different Apple ID for these services in Settings. Note this has to be the same ID for both. Go to Settings > Messages > Send & Receive, and make sure both your telephone number and Apple ID are input there and both show a checkmark. If you need more help, check out this link: Add or remove your phone number in Messages or FaceTime - Apple Support .
3. In the support article: If you subscribe to Apple One and use a different Apple ID for iCloud - Apple Support Apple alludes to using a different Apple ID for media subscriptions and purchases but doesn't describe how to do this.
In iOS/iPadOS: Go to Settings > [your Apple ID] > Media & Purchases. Sign out of your current ID and sign in with a different one.
In Ventura: First, quit Settings. Then, in App Store, choose “Sign Out” in the Store menu, then click on the “sign in” button that appears in the main window. You can then sign into the other account. ( https://discussions.apple.com/thread/254568066?answerId=258576965022#258576965022 )
4. Use a different Apple ID to share purchases with Family Sharing
Use a different Apple ID to share purchases with Family Sharing - Apple Support