Which system versions are you and your husband using?
When you want to share your iCloud Photos, you may want to set up the Shared iCloud Photos Library. This way, the shared photos will only be stored in iCloud once, in the shared iCloud Photos Library, but you can work with them from both your Photos Libraries. The Shared iCloud Photos Library can be used on devices with macOS 13 or later, iOS 16 or later, iPadOS 16 or later. If all your devices are able to run the most recent system versions you can move the photos you want accessible to both of you to the shared iCloud Photos Library. See: What is iCloud Shared Photo Library in Photos on Mac? - Apple Support
It is not supported to share an iCloud Photos Library in any other way. Your iCloud Photos Library is tied to your AppleID, you would have to share the AppleID, which is not recommended, because then your email and all other items tied to the APpleID would also be shared. You cannot share the local copy of the iCloud Photos Library on your Mac either, unless you move it to an external drive, locally mounted with a wired connection (not a NAS!) and with the "Ignore ownership on this volume" flag enabled.
And the external drive would need to be mounted and plugged in whenever you are signed into your user account, even when you are not using Photos, but the System Photos Library needs to be available at all times for the background processes. This is not feasible, of you are sharing a library between two users.