If I have apple i cloud back up do my photo get showed with my family i cloud account

If I have apple i cloud back up do my photo get showed with my family i cloud account

The answer is no and in two parts.

Your iCloud Photo collection is private, as is all your content in Family Sharing - unless you choose to share it and that includes your location in Find My. iCloud Photos isn't backing up your photos but rather it is providing a syncing service with your collection in iCloud interacting with your devices. You can create shared photo albums or accept invitations to join a shared album. This is true also outside a family sharing group.

If you mean backup in the sense of your iPhone backing up to iCloud this is used only for the device which is backing up, or your new device which with which you are restoring the data to set it up as a new iPhone.

Apple says in What is Family Sharing

Everyone's personal files and preferences remain private.

When you share iCloud+, family members can't see each others’ photos, files or documents. And when you share other subscriptions, such as Apple Music, Apple Fitness+ or Apple TV+, each person will see their own preferences and recommendations – not the whole family’s.