Hi @matthew-pearson
There are a lot of missing functionalities as standalone dedicated modules.
What you can do, is use aci_rest module to post the config as you want: https://docs.ansible.com/ansible/latest/modules/aci_rest_module.html This is what I do for L3Outs where are a loooot of missing modules.
How you can build your own aci_rest module you might ask? well, you simply save a working config for a specific object you want to push through ansible (right click in ACI GUI > save as > config only + json) and you change the variables in your playbook.
Let me know if you have any questions.
Stay safe,
Sergiu