Feats gained from a Spellcasting Archetype and how they affect the Spellcasting Base Class

[Nalis]

Here's the situation:
Bard takes Sorcerers Dedication Archetype

Question: How do feats gained via the Archetype affect the Bard spell repertoire?

This thread addressed metamagic feats:
https://paizo.com/threads/rzs42pt9?Crossclass-metamagic-feats#1

The conclusion there is metamagic feats can be used on any spell, either from the base class or the archetype.

But what about non-metamagic feets?
Dangerous Sorcery - Has only the 'Sorcerer' tag. So it only affects spells gained from the archetype?

Cantrip Expansion - Has 'Bard' and 'Sorcerer' class tags. Would it affect both sets of cantrips or only those from the archetype?

[Orithilaen]

I think Dangerous Sorcery should only apply to sorcerer spells, but my sense is that mine is the minority view. I don't have anything in rules text to go on here, just my sense that Dangerous Sorcery is a very good ability that is sorcerer-only for a reason, and the idea that the way to make a good non-sorcerer blaster is to take two sorcerer multiclass archetype feats rubs me the wrong way.

For Cantrip Expansion, I think it is much clearer that it only applies to spells from the archetype. The key language is "your spell list" and "your repertoire," both of which are singular. It's talking specifically about the spell list and repertoire for the class you're taking it for.