Very large rallies for and against President Yoon’s impeachment took place in Seoul this weekend:

Rallies led by conservative activist pastor Jeon Kwang-hoon and the conservative Christian group Save Korea began near the Gwanghwamun area in downtown Seoul and Yeouido in western Seoul at 1 p.m. to oppose Yoon’s impeachment.
Police estimated up to 120,000 people had gathered for the two rallies.
Dozens of lawmakers from the ruling People Power Party (PPP) attended the rally in Yeouido, including Rep. Yoon Sang-hyun, who delivered a message on behalf of the impeached president on the rally stage.
“When the will and the sense of responsibility to defend freedom are lost, communist totalitarianism and populism will take its place,” the lawmaker quoted Yoon as saying. “We must fight until the end with that will and sense of responsibility.”
What is interesting is how the conservative rallies completely dwarfed what the left wing parties were able to muster in support of Yoon’s impeachment:
DP leader Rep. Lee Jae-myung was among the 18,000 people gathered for the rally near Anguk Station, where the Constitutional Court is located, according to an unofficial police estimate. The DP said some 130 lawmakers took part.
Lee denounced the PPP, claiming that those who deny constitutional order and the rule of law cannot be conservatives. (….)
At 5 p.m., another group of protesters calling for Yoon’s ouster held a rally in downtown Seoul, with about 15,000 people gathering, according to police estimate.
Participants held picket signs supporting Yoon’s impeachment and chanted, “Hurray for democracy,” and “Hurray for ending insurrection.”
So between the two left wing rallies they were able to muster 33,000 people compared to the conservative rally that had 120,000 people. For those that have followed rallies before in South Korea the turn out for the left is pretty pathetic by their standards. For example for the anti-US beef riots in 2008 drew far more than this in one rally much less two.
I think what this shows is that there is not broad support for President Yoon’s impeachment and that within the Korean left there is also not as much support for Lee Jae-myung as some believed.