Most FF series has Libra spell, Why not FFXIV

[NoctisUmbra]

Give us Libra spell to see monster HP, DEF, MDEF anything

Then add bestiary section, completionists will lost their mind.

Mobs do not have Def or MDef values. They only scale in HP. You'd literally only be seeing their HP... and there's a bar for that, which also happens to show their buffs and debuffs.