How to teach baby to stand up alone?

My 14 month year old is always wiggling around when standing. She stands great with support, she’s very steady even when she is just holding onto 1 of our fingers for “support”, but the second she’s by herself she drops to the ground. I’m sure she can stand independently, she just for some reason doesn’t like to stand still alone and is always moving herself around so will either wobble her body around til she falls or drop to the ground on purpose. It’s like she doesn’t know she can just stand up independently without moving around. Hopefully that makes sense.

Any advice or activities to try would be great! Thanks!