The Business lounge at Satellite must have opened in the last few days then - when I was there a week ago, I have definitely been in the Senator side, with my FTL. Biz side was closed.

I did not check the lounge yesterday, as there had been a queue to enter, so I went ahead and went to G, where both SEN and Biz sides had been open since at least early January.
(I did check FCL in K and it was closed)

FWIW the offer of drinks between SEN last week and Biz yesterday was identical, food was different, but along the same lines, so I guess it's just the regular rotation. Kaesespaetzle were excellent, by the way.