I'll be arriving in FRA on LH in F and then flying to several others locations on LX/LH/OS in the next few days before continuing to BKK on TG F.

These flights are all on the same itin and I should be treated as if they are flights in F (even though they are in C) for baggage purposes. However, will I gain access to the MUC F, ZRH F etc lounges 2/3 days after my original flight into FRA?

I believe after my last LH/LX/OS flight, prior to boarding TG, I will not gain access to these lounges, but that's not my question.