Still not sitting up?

Kk 💀

My daughter will be 6 months old next week and she still isn't sitting up on her own qiute yet (has only done it once) or holding her own bottle. She was doing so good on hitting her milestones until recently. She also won't put any weight on her legs when I try to have her stand. Is this bad?

She is technically my first, so I worry. Any suggestions?

Thanks ladies 😊

Here's a picture of her cuteness just because!