Hi, Gustavo. after doing some research I couldn't manage to find anything similar to "Disk Groups affinity rules", which I think it is what you need. VSAN places the components across diskgroups but you cannot decide in which one. I would recommend you to select a VM, check which disk groups it's objects are running, move all compute workloiads from there and only leave the hosts contributing storage to the cluster. Finally reboot the hosts and take a look at the cluster behaviour and how vSAN marks the object as absent for a few minutes.
Please note that the VM will remain accesible only if it has FTT > 0.
I know this is not the best option for you. Maybe the closest approach for waht you need is to remove only one object component and track how it is rebuild but I couldn't find information about how to only remove one component without deleting the entire object.
Remove inaccesible objects: https://www.thinkcharles.net/blog/2018/2/16/removing-inaccessible-objects-in-vsan
Thank you very much for your answer!
Just for clarification - you can't delete a portion/replica/component of an Object using objtool, only entire Objects (whether they are healthy/accessible or not).
Thanks, Bob! Nice to have the confirmation