Roku Setup TV Power/Volume Control

I have a Slyvox outdoor Smart/Google TV and using the Roku to get the TV apps not supported by Google TV.  

SYLVOX Outdoor TV, 65 inch Smart... https://www.amazon.com/dp/B0D3H8QXJK?ref=ppx_pop_mob_ap_share

I’m setting up the Roku remote and would like it to control the TV power/volume but the brand is not listed in the TV brand list for setting up remote.  Is there an equivalent brand/code that will still allow it to work with this TV?  Thank you!