Oh I know about that (more or less haha)but I was not talking about the production of their music but the promotion of the group! The activities they do when they have a comeback, the side-content they release / make, the general image, etc.
Promotion wise they kinda don't exactly have the kind of promotion idol groups have. In fact in their earlier years they didn't even promote on Music Shows, or even id they did it was like only 1 or 2 performances. Like they didn't even had a debut stage on music shows, they held their own mini fan concert or something.
I think they do mostly more concerts rather than go on programs etc. Like 2017 they held an entire year long EveryDay6 concert. 2018 was their first world tour, 2019 was their second, so touring is kinda like their way of promoting. If covid didn't happen and that all the members were mentally well they definitely would also have done a tour in 2020.
Also they release like 2 albums a year, and considering they write and co-produce all their songs, I think during their free time they are practising for the tours (since they will be playing them instruments live), or busy preparing and writing songs for their next album. Probably don't have the time to go on variety shows or other long programs