Moderator: In this French area of the forum you can use the French language, that is what this area is for if you look at other threads here.
If you want the thread to be in English I can move it to the main Workstation Pro or vSphere areas - that's up to you.
To answer your questions (in English), while the current version of Workstation doesn't list ESXi 7.0 as an option for the VM it should install and work correctly if you choose ESXi 6.x for the VM but then install 7.0.
This should help you: https://vinfrastructure.it/2020/04/installing-esxi-7-0-on-vmware-workstation/
thank you very much, I will try this now