For example the penance damage has a different ID than the penance cast. There are some WoW API related to this, to be checked

The wow api related to this issue is very limited, I found only:

• https://wow.gamepedia.com/API_FindBaseSpellByID
• https://wow.gamepedia.com/API_FindSpellOverrideByID

The solution would be to use https://www.curseforge.com/wow/addons/libplayerspells-1-0 (and help maintain it up to date ?)

Also note that the current spell scanning will depend on the active specialization. For example Fire Blast is in the Mage tab for Frost Mages but it's in the specialization tab for Fire Mages. Using LibPlayerSpells could give a consistent UI.

API_FindSpellOverrideByID is now used, but it's dependant on the configured talents so not generic enough.

LibPlayerSpell added. It's not prefect, but way better than nothing !