I occasionally check for orphaned packages in the pamac gui. The only one listed at the moment is dnssec-anchors. I do not know what this package does, but I do know it’s a core Arch Linux module that is flagged out of date. I would appreciate any guidance from someone wiser than myself.
At least it’s still in the Manjaro’s repo:
dnssec-anchors
But I agree it’s not maintained for years…
In case you have no package depending on it you can safely remove it.