Yeah, the numbers for domestic toy sales was the same as LuPat but I don't think the show did gangbusters like you said.

Mark your calendars, everyone! The cast of the 2019 Super Sentai Series and TTFC are gonna give a (rather belated) Christmas Gift to the online viewers: Kishiryu Sentai Ryusoulger: The Legacy Of The Master's Soul Episode 3/Final Episode will be on December 26, 2021, as stated by Toei's Official Twitter Account.
Hope and pray that by next year, it's the Kiramagers' turn for more TTFC Spinoffs! Please, make more of them, Toei!!!