Note, the name of the card is "Strength", not "The Strength" (at least in English ;))

In a lot of English card-meanings they use "the strength" and also "strength". I thought "the strength" sounds more… majestic 😇

I've only ever seen it in decks that were not designed by English natives. Maybe you got confused seeing "the Strength (tarot) card" thinking "the" belongs to "strength" but it actually belongs to "card".
It really is incorrect to use "the" there, but ultimately it's your design so you can choose whether you want to keep it or not :) I just wanted to point out a rather obvious error that makes it look really weird.

Note: there are more major arcana cards that do not have the article:
Justice
Strength
Death
Temperance
Judgement
all of which are not physical items or persons/personas.

I love this!

Thank you