"The goal of the passive-aggressive person is to get someone else to visibly act out the anger that they have been concealing,"

Okay

'Per my last email', 'Any update on this?', 'Please advise', 'Re-attaching for convenience'

How are those phrases in particular helping anyone achieve a goal of getting someone to “visibly act out anger they have been concealing”?

Also angry and concealing emotional state is technically exhibiting traits of passive aggressive behavior

passive-aggressive

adjective

of or denoting a type of behaviour or personality characterized by indirect resistance to the demands of others and an avoidance of direct confrontation

I mean, come on. If you receive an email asking for a follow-up on a discussion you had IRL and you perceive that request to be an act of hostility because you are concealing anger - is it really fair to say that the email is passive-aggressive rather than the recipient?