I have a few questions my upcoming trip through ZRH, having been through FRA/MUC on LH F a few times, I am familiar with the rules but it appears that ZRH lounge operate somewhat differently despite being in the same LH group.

I am flying BOS-FRA-ZRH-MUC with BOS-FRA in F and connecting with FRA-ZRH-MUC in C+Y, all on the same day as my arriving intercontinental F. With LH F BP, I should have access to FCL/FCT in Frankfurt (and even Munich on arrival) but what about in ZRH? I am under assumption that FCL access in ZRH is included as part of the deal but it seems like a lot of people having difficulty trying to get in.

If access is included, my plan is to use FCL E with the layover just under 3 hours (arrive at 5pm and depart at 8pm) Will that be enough time? I am holding a US passport, factoring in the extra time I will need at passport control.