Answer
Use the "copy values to profiles" capability from the source profile to push the new tab out to other profiles — a custom tab isn't automatically inherited by every profile just because it exists on one, it has to be explicitly propagated.
Use the "copy values to profiles" capability from the source profile to push the new tab out to other profiles — a custom tab isn't automatically inherited by every profile just because it exists on one, it has to be explicitly propagated.
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