As a Roku consumer, please have equal advertising for political and social views. I have seen the ad several times promoting abortion, however have not seen any ads supporting the right to choose life for the unborn.
I'm pretty sure ads on most channels go to whoever pays for them. So, chances are that if you want to purchase an ad spot, you probably can.
No ad promotes abortion, but some advocate for freedom of choice. There's a big difference.
“Freedom of choice” is just a euphemism for abortion for those who are afraid to say it, everyone knows that.