To be honest, I really don't think he cares enough to amplify a voice that isn't his own. He said the other day that he doesn't feel qualified to speak on the issue, even though you don't have to be an expert to understand that systemic racism is wrong and say so - but despite not thinking he's qualified, he's gonna chime in anyway.
His silence has definitely been pretty loud, especially considering - like you wrote - almost all of his Jar friends have spoken out. And Carina, who name drops him at every opportunity, left him out of all the BLM posts she made where she tagged other high-profile people. After his not all Texans!!1! BS and subsequent breakdown and regret over his apology, some of his other questionable racial stuff, and the fact that he's married to someone who bought toned-down All Lives Matter merch and gave it to her friends...I really don't think this is an issue that he cares about much, if at all. I fully expect his opinion to be a complete shitshow, although I hope he surprises me!