This is what is known as the 8 series (2019) in the US last year. It was absolute garbage, even below traditional FALDs because TCL has no real good algorithms for them, so it under-performs compared to the hardware available. In other words - don't hold your breath.
Their 8 series this year is supposed to go 8K and have a new implementation they call "Vidrian" technology. But the 75" is like $10k (and not available yet), so...
https://www.displaydaily.com/article/display-daily/tcl-to-sell-ijp-qdoled-tvs-this-year
MiniLED has a bright (heh) future ahead, but it's not been done well yet. We'll see if Sony adopts it next year, that would be my hope for a decent miniLED set.