Milk supply dropping 8 month old! Help!

Baby won't nurse longer than a few minutes per time, she used to feed for ages before bed but now is done in 10mins!

Could it be supply dropping and her not getting enough milk so is giving up?

So worried her feeding habits have changed so much since she hit 8 months. Losing interest in breastfeeding but also barely eating any solids? Could she be weaning.