Minoxidil foam twice a day for 8 months. Temples improved, crown still thin. Worth adding something else?

Been on 5% minoxidil foam twice daily for about 8 months. The temples filled in a bit and the shedding slowed down after the first couple of months. Crown is still noticeably thinner under direct light. Not on any DHT blocker yet. Is it worth adding a low dose of finasteride, or do people usually give minoxidil a full year before deciding? Also curious if switching to the liquid version made any difference for anyone on the crown.