LH M&M does not have any award availability for SFO-MUC and MUC-SFO on the dates (12 July and 10 August) in C or F. I also checked the next days, 13 July and 11 August, nothing.

I have been able to get award travel on LH, using M&M miles, close to my departure date (48 hours), but I cannot say for sure if that is because they opened up some additional inventory, or whether it was always available.