FYI, LG and Samsung were both confirmed to take and upload periodic screenshots, whether you're using native apps or an external input.

Shitty article with guide to disable ACR: https://appleinsider.com/inside/mac/tips/how-to-stop-your-lg-or-samsung-smart-tv-from-tracking-you (you might want to block traffic altogether knowing what they are ok with doing)

Primary source for finding: https://arxiv.org/abs/2409.06203