In January 2018, it was reported that Lil Yachty and Takeoff were working on a collaborative project.[34] This project has yet to be released as of 2022. Yachty's second studio album, Lil Boat 2, was released on March 9, 2018.[35] Despite receiving mixed reviews from critics, Lil Boat 2 performed well commercially, debuting at number two on the US Billboard 200, with 64,000 album-equivalent units. The album featured 2 Chainz, Quavo, and Offset, Ugly God, among other guests. On October 19, 2018, Yachty released his third album, Nuthin' 2 Prove. The project received similarly mixed reception and debuted at No. 12 on the Billboard 200. Also in 2018, Yachty appeared on Social House's gold single "Magic in the Hamptons" and Bhad Bhabie's platinum single "Gucci Flip Flops", and worked with Donny Osmond to create a theme song for Chef Boyardee titled "Start the Par-dee".[36] In December 2018, E-sports group FaZe Clan announced that Yachty had become their newest member. Yachty took on the name "FaZe Boat", in reference to his 'Lil Boat' nickname and mixtape.[37]
After a relatively quiet 2019, Lil Yachty teamed up with fellow Atlanta artists Lil Keed, Lil Gotit, and veteran producer Zaytoven in February 2020 for a collaborative mixtape, A-Team.[38] Yachty released the lead single for his next studio album, Lil Boat 3, on March 9, 2020. The song, titled "Oprah's Bank Account", features Drake and DaBaby.[39][40] The release was accompanied by a 9-minute music video directed by Director X, in which Yachty dresses up as a parody of Oprah Winfrey.[41] Lil Boat 3 was released on May 29, 2020 and debuted at number 14 on the US Billboard 200.[42] A deluxe version of the album titled Lil Boat 3.5 was released on November 27.[43] On October 19, 2020, Lil Yachty announced his intention to release a mixtape before the end of 2020.[44] Michigan Boy Boat was released on April 23, 2021. The project draws heavily from the burgeoning Detroit rap scene, in contrast with Yachty's usual pop rap and Atlanta trap style.[45] Throughout 2020, Yachty was one of the many celebrities to gain a large following on social media app TikTok.[46][47] Yachty performed the theme song for the 2020 revival of Saved by the Bell, which was a remixed version of the theme from the original television series.[48] In early 2021, Yachty was reported to be producing and starring in a live-action movie based on the UNO card game, which is being developed by Mattel Films.[49] Yachty is featured in the Pokémon 25th anniversary music album.[50] On October 11, 2022, Yachty released the non-album single "Poland", which had recently went viral online.[51]