Can a single Storage Backup subscription be shared with all Family Shared devices?

Can a single Storage Backup subscription be shared with all Family Shared devices?

I have a 200GB storage subscription for 5 of my family iPhone backups under a single apple id account.

I am separating each iPhone to its own apple id to avoid on-going problems. Can I share the storage backup with Family Share?

If I cant, I will have to buy a backup storage subscription for each device that will be more expensive.