Ok. Don't panic. Exclusion sounds like a big word - and it is but the LA have a legal responsibility to provide your DD an education. So it won't be bye bye and end of.
It sounds like this behaviour has been consistent since nursery. So there must be a list of evidence of what they've tried and what has and hasn't worked as long as your arm.
This can be used to apply for an EHCP. See the IPSEA website as you can start the process as a parent.
Ask for copies of her school file via a SAR (subject access request). Use that information to help you. Show that DD needs an assessment of need as the usual stategies available in MS school haven't worked.
Ask the school specific questions. So ask when your DD is throwing and hitting what they do. Ask if she has a safe space to go to or if they are escorting her there. She shouldn't be excluded if when the behaviour starts they just allow it to continue without immediately removing her and adressing it.
Suggest things like now/next cards and timers. Set her small achievable goals. So now is sit for register (star for managing it) next is run around playground. (Talk to them about movement breaks - they should know about them or can research).
Then next English. (That should be something achievable with 1:1 and for an acheiveable timescale). So if her concentration is 3 minutes then she does 3 minutes with a timer and gets a star. Next maths. Follow same routine for English. Again a star.
It maybe concentrating for an hour is too much for your DD currently. So if she's using all her resources to manage her behaviour for an hour the likely outcome is a bigger explosion later on.
Agree a reward stategy. Eg 5 stars = computer/iPad. Something she likes. Agree how long the reward I'd for an use timers.
What engages her? Is she more likely to learn the history stuff by watching something on screen than by listening to teacher talk? Could she watch something relevant like a horrible histories clip related to teacher income and then be support d to write a sentence/ or even dictate a sentence for a scribe about what she's learnt to show she understands and has met learning outcome teacher set.
The whole idea of lessons is to learn (X). Your DD can still be given that opportunity but through the creativity of finding a way she can learn it.
There's absolutely nothing wrong IMO with your DD doing a spelling app or spelling programme on computer if the pupils are learning spellings. If the point is they learn them they need to find a way she can do this.
The most important thing to discuss with the school is what can she manage. What can she do. Start there. Start at what is acheiveable or she's instantly being set up to fail and that will only add to her difficulties.
And yes, if called DO NOT walk out of the school with your DD without an exclusion letter in your hand that states the reason why, how they tried to prevent it and what happened. Then at reintegration meeting make sure a plan is written clearly stating how they will support to DD to prevent it happening again.