Don’t add your personal iCloud account even if you want. Your goal is to not have to repurchase your music, apps, etc., but not commingle your personal photos

Don’t add your personal iCloud account even if you want. Your goal is to not have to repurchase your music, apps, etc., but not commingle your personal photos and messages. You can do this with iCloud family child accounts. To use “your” stuff you paid for on a “work account” they ask you to set up using alternative email address, you can make the work account be a family child account. Then the work account can use purchases etc., and you control its access even if work attempts to take it.