> they aren't prohibiting operating systems, they _might_ be prohibiting installation of operating systems that are not approved on certain types of devices that ...
"prohibit installation" means to ban.
"operating systems that are not approved on certain types of devices that ..." means specific operating systems.
So, the FCC "might ban specific operating systems"; you've paraphrased what the title says.
"prohibit installation" means to ban.
"operating systems that are not approved on certain types of devices that ..." means specific operating systems.
So, the FCC "might ban specific operating systems"; you've paraphrased what the title says.