I am a French national, 5 years in the UK, and settled. My partner (opposite sex) of 1 year is a US citizen, working for a US company as a freelancer, going in and out of the UK.
I've read a few thread about similar situations, but I would like a more straightforward answer, if possible

We want her to live and work in the UK and are exploring different avenues. Marriage in the UK is an option, we are also considering a French PACS.
PACS
If we were to get a French PACS at the French consulate, would it be recognised as a civil partnership, enabling us to get a Family visa?
Or do we need to get a PACS in France? The guidance is not clear to me on this.
Family visa
Our understanding is that she would be able to work and get a legal life in the UK under the Family visa. Is this correct?
Once we have a Family visa, would my partner be able to apply for pre-settled?
Lawyer
Should we consider a lawyer to help with the above process?
Thank you!