On October 4, (G)I-dle performed as first-time headliner at the Spotify On Stage Jakarta. They were one of the six acts, including Rich Brian, Ateez, and others. On October 5, the group appeared on Immortal Songs 2, a KBS reality television singing competition, the group's first appearance on the program. They performed a rendition of Koyote's "Sad Dream" as a part of the group's 20th anniversary. (G)I-dle performed "Put It Straight (Nightmare Version)" for Queendom's Fan-dora's Box round. The stage performance reached one million views after fourteen hours of release, and (G)I-dle placed fourth in the round. On October 25, (G)I-dle released "Lion" as part of the EP Queendom Final Comeback. By November 2019, the live performances of "Latata" and "Fire" surpassed 11 and 13 million views, respectively. (G)I-dle finished the show in third place. "Lion" became a sleeper hit, gaining popularity due to their stage concept and re-entering real-time charts of various music sites. A music video for the song was released on November 4, surpassing five million views in two days. "Lion" debuted at number 13 on the World Digital Song Sales and peaked at number five. Meanwhile, the single rose eighty-nine spots to number 19 on the Gaon Digital Chart and topped China's QQ Music Korean Song chart for two consecutive weeks. On December 21, (G)I-dle performed their hit singles at the 2020 Tainan Christmas & New Year Eve Party at Tainan City, Taiwan. Their segment was the most-viewed of the event, with an audience of 80,000 people.