On May 27th 2021, Prime Minister Trudeau said:

“We support the call by the United states and others to better understand the origins of COVID-19,” Trudeau told reporters.
“I know there are a lot of theories out there, but we need to make sure we’re getting to a full and complete airing of the facts to actually understand what happened and how to make sure it never happens again,” he added.

However this contrasts with Canada's earlier official position. In May 2020, Trudeau said:

Speaking to reporters on Sunday, Trudeau said Canada has been working
with its Five Eyes partners — Australia, New Zealand, the United
Kingdom and the United States — on “various” pieces of intelligence
regarding the COVID-19 outbreak.

But, he said it is “too early to draw firm conclusions.”

Trudeau said Canada will continue to work with intelligence and allies
around the world to “find answers to the many questions people are

The Five Eyes then prepared a report rejecting this hypothesis:

There is no current evidence to suggest that coronavirus leaked from a
Chinese research laboratory, intelligence sources have told the
Guardian, contradicting recent White House claims that there is
growing proof this is how the pandemic began.

The sources also insisted that a “15-page dossier” highlighted by the
Australian Daily Telegraph which accused China of a deadly cover up
was not culled from intelligence from the Five Eyes network, an
alliance between the UK, US, Australia, New Zealand and Canada.

Afterwards Trudeau was mute on the subject, despite President Trumps and Secretary Pompeos persistent attempts to reopen the subject, up until President Biden expressed his support for a fresh investigation.

What new pieces of information became available over the past year that might have made Trudeau?

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