OpenCTI : Missing Threat Actor Entities feeds

[staphysec]

Hello, in OpenCTI, I've noticed that all reports/feeds/ connectors are inserting intrusion-sets, but threat actors are consistently empty. Is there a specific Cyber Threat Intelligence (CTI) reason behind why connectors are adding intrusion-set entities but not including threat actor entities?

[SunnyHazuki]

Same here

[Henning15]

Hello... just wondering if you got a way to remedy this please?
A link to guide me perhaps..?