Hi @i-o-qvist!
There is no such functionality in the current roadmap, but I can see the beauty of it. I usually solve this with a loop calling DELETE /api/v2/devicex/{installation_id}/{devicex_id}
for all objects.
What is in the roadmap however is exactly that functionality but in the web GUI. I.e a mass-deletion function.
Thanks for the question and Welcome to the Forum!