Meanwhile, First Minister Rhun ap Iorwerth emphasized that the incoming Welsh secretary ought to be someone who respects and wishes to see devolution succeed.
He noted that he has not yet spoken with Burnham, who assumed the premiership on Monday, although a meeting is scheduled.
Ap Iorwerth added that Sir Keir had shown little interest in devolution or Wales, and he expressed hope that a new prime minister would provide “an opportunity for a reset” in Cardiff‑London relations, noting Burnham’s background in understanding and valuing devolution.
Speaking on BBC Radio Wales Breakfast, Tonia Antoniazzi described the past 24 hours as “brutal” for her colleagues and friends.
The MP for Gower added that Burnham and Kinnock must reverse the trend after Labour’s historic loss in the Senedd elections in May.
“I believe many viewed Reform as a protest vote; numerous supporters shifted to Reform or Plaid Cymru, resulting in a changed Senedd that we accept,” she said.
Antoniazzi, who also chairs the Northern Ireland Committee, said she looks forward to collaborating with Chris Bryant, MP for Rhondda and Ogmore, who has been appointed Secretary of State for Northern Ireland.