ROKU boasts about having OP LIVE but it’s not LIVE it’s always a rerun. That is false advertising and I welcome them being sued! The won’t let me post L a w s u I t!! 😂
You need to subscribe to Reelz (either through cable package, or a cable-alternative package like YoutubeTV (add-on package), Sling TV, Philo, DirectTV Stream, etc that carries Reelz) in order to get the actual Live broadcast of On Patrol:Live.
Otherwise, Reelz offers to OTT streaming services, like Roku Channel and others, access to the Reelz library which contains previously aired/encore (re-runs) of On-Patrol Live.
Complete info re: On Patrol on Reelz is here. https://www.reelz.com/get-reelz/ (Look under the "Premium Streaming" and "Free Streaming Channels" to understand the above.)
A little more info re: On Patrol. https://www.reelz.com/extra/how-can-i-watch-on-patrol-live/
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Streaming can be a little confusing, especially with the terms. (ie "live programming"). Really need to research, or ask here in the Community, if you have any questions.