Unsupported Model: Samsung officially states that "Galaxy AI is not supported on Galaxy S9 FE, A series tablets, or on other phone and tablet models not listed in the compatibility section". This explicitly indicates that your A-Series tablet, regardless of the software version, is not designed to support these features.
Software Requirements: While you mention OS version 7.0, Galaxy AI features generally require the One UI 6.1 software update or newer to function. Even if your tablet were compatible, an outdated One UI version might also prevent the features from appearing or working correctly.
"Menu Not Available" Explained: When you search for Galaxy AI and click on the option, the "menu not available" message likely appears because the system recognizes the feature name but the underlying functionality and settings are not present or accessible on your specific device model.