Privacy-protecting alternatives:

iPhone -> Google Pixel

iOS -> GrapheneOS

iCloud Photos -> Ente

iCloud Drive -> Proton Drive

iCloud Mail -> Proton Mail

Passwords and Keychain -> Bitwarden or Proton Pass

Notes -> Standard Notes (Proton)

iCloud Calendar -> Proton Calendar

Do not use Google services as some are not end-to-end encrypted.

Self-host if you can and know what you’re doing.