The 'oooh, you must use preferred pronouns as misgendering is literal violence' and 'oooh, you must apologise for the huge psychological distress that your deadnaming someone caused' is pure and simple abusive, coercively controlling gas-lighting.
And I further remind everyone here that the so-called phenomenon of "deadnaming" is not illegal.
The GRA 2004 is explicit here in the Explanatory Note 28 related to Section 9:
"Subsection (2) provides amplification of subsection (1), making clear that the recognition is not retrospective, so the certificate does not rewrite the gender history of the transsexual person, and that the new gender applies for the interpretation of enactments, instruments and documents made before as well as after the issue of a certificate."
Note use of " not retrospective, so the certificate does not rewrite the gender history of the transsexual person".
Yet again, the GRA 2004 is being misrepresented by those who seek to control us all.
And, of course, since only circa 5000 people [mostly males] have a GRC, so-called "misgendering" of cross-dressers, transvestites and other AGPs etc is never an issue.