I hope you find a solution soon

can you bring her into bed with you, or put a mattress on the floor of her room? 2 is a big separation anxiety time and it sounds like she needs you.

Wrt bedtime I don't think your dd is manipulating you, just expressing a need, and the sooner you address the need, the sooner it should pass.

As for the other tantrums, I think it's pretty normal. I encourage dd to take deep breaths which works well for us, but she's just shy of 2.