Unfortunately there isn’t much you can do about the hair loss but wait it out. If you want something to help it grow and help with the slit ends though, I did 10 minutes of caster oil mixed with olive oil and a few drops of rosemary oil on the scalp and through the ends once a week before I washed my hair. It really helps and I can tell a huge difference.
After birth, the Hormones cause body dramatically so, one way to able manageable is take nutrients and vitamins :( I would say take some postpartum vitamins alike Perele have them.
Following because I’m in the exact same boat. I’m 5 months pp and started noticing my hair falling out waaay more and my hairline thinning a bit.