I am not that experienced as an FI(R) but PFL's before first solo - yes. Once the landings and cicuits are starting to come along OK I take them out of the circuit for a detail and go and do PFL's.
Then in the next circuit detail we look at flapless and glide approaches. On the day of first solo I make them do an EFATO and glide.
I always brief a solo circuit student on diversion if airfield closed. I tell them which airfield to go to, give them the relevant airfield plates and ensure navaids are tuned to get them there before I get it. I tell them should they have to divert to declare a Pan. Only an airfield with a tarmac runway and full ATC facilities will do.
Having done first solo if we get a day where it is flyable but not suitable for student solo circuits then I will do exercise 15 or exercise 19 instead.