dnd 5e – Are the “Touched” feats’ spells ever subject to a spellcaster’s class rules (such as regarding preparation, components, and focuses)?

The Fey Touched and Shadow Touched feats published in Tasha’s Cauldron of Everything each grant the use of two spells. Among other things, they say:

  1. You learn the [spells].
  2. You can cast each of these spells without expending a spell slot [once per long rest].
  3. You can also cast these spells using spell slots you have of the appropriate level.

The spellcasting ability for these spells is specific to the feat, so it may or may not be the same as the ability of the class that granted the spell slots.

My question applies to both feats and all spellcasting classes, but for the sake of clarity consider an artificer who has taken Fey Touched, which grants Misty Step. Artificers must add the M component to all spells they cast using the artificers’ spellcasting feature, but #2 above has nothing to do with their feature so shouldn’t require that. That’s good, because the reason the artificer can teleport is their prior exposure to the Fey, not some magical widget.

However, things get more complicated when they’re casting Misty Step as described in #3, because the artificer’s spell slots do come from their spellcasting feature. In that case, does the artificer simply use the spell slot as “fuel” and otherwise cast the spell exactly as it had been cast for #2? Or is this inherently different, for which we must assume the artificer studied the Misty Step effect and replicated it with a widget?

If the former, we can assume the spell never needs to be prepared; if the latter, it almost certainly does need to be prepared like all artificer spells.

Also, Misty Step is not on the Artificer Spell List, but the Invisibility spell granted by Shadow Touched is. Would that alter the answer in any way?

Potentially Related:

Does Magic Initiate allow the chosen spell to effectively be “always prepared” if the spell is on their spell list?

What makes a spell being cast considered to be a {class} spell?

If a spellcaster’s racial trait grants a spell that requires material components, can they use their class’ focus to cast that spell?