At the moment, as you can see, Availability Tool says there is plenty of room in business class:
SFO MUC 14/2125 15/1735 LH459 C9 D9 Z9 Y9 B9 M9 H9 Q9 V9 W9 S9 [346]
CDG FRA 30/1355 30/1515 LH4219 C9 D9 Z9 Y9 B9 M9 H9 Q9 V9 W9 S9 GC KC LC TC [321]
FRA JFK 30/1720 30/1925 LH404 F9 A9 C9 D9 Z8 Y9 B9 M0 H0 Q0 V0 WC S0 [744]