Template select Exposed entities

Would really appreciate a way to retrieve in template a list of entities exposed to Assist. Even if exposed status could be available as an attribute, this would be helpful. Especially with the push to Assist / LLM, custom / spec functions to LLMs will absolutely need access to this kind of information. A good example of this is a template_value function that returns a current list of exposed entities for an LLM to update its understanding of the smart home.

Thanks in advance!