I could have write your post 6 months ago. In fact I probably have after falling down the Google rabbit hole... 🤔
Long story short, my DD that had been cruising since 7-8 months walked independently at 14 months when she was darn well good and ready.
She also wasn't babbling much (if at all) back then. Now, we've got a handful of words (daddy and oh dear most prominent) and animal sounds (quack!). She's probably a little behind on speech, but I'm no longer worried.
As for playing, independent play is wonderful, and if anything should be encouraged. Besides, actually playing with people doesn't come for a long time yet. Banging her legs on the floor sounds like she finds it fun, nothing more. She'll probably stop when she discovers a new thing to do.
I'm yet to meet a baby that responds to their name every time. Or even most of the time. Especially when their attention is fixated on something. If you're overly worried, I would have her hearing checked. As a PP asked, does she smile and make eye contact with you at all?
Tbh there is always a chance she could be autistic, but everything you've listed sounds very much in the realms of normal. Plus, at 12 months, it's far too early to tell. She's got a lot of growing and developing still to do.