Reach spell feat question

[heavyfuel]

I read online that the Reach spell feat turns touch spells into 30' range spells for legal Chain spell feat and Persistent Spell feat.

That's very debatable. There are no rules that refer to a specific order in which Metamagic feats are applied, or even if there is an order at all (in which case they must all be applied at once)

This statement that Reach spell makes such spells legal for Chain and Persistent spell is not necessarily incorrect, but it's at best a "ask your DM" question.