Does he support it publicly? I'm not really aware of anything noteworthy other than when he came out a decade ago. Not saying it's necessary but I wouldn't characterize him as an LGBTQ activist.
He has been in a pride parade in the past and has mentioned it in interviews/tweets.
I wouldn't call him an activist at any stretch, but he doesn't hide his support.
Well, in the countries where it is good PR to do so. They tend not to show the same face worldwide, in countries where it would not be good PR.