We have two TVs outside on covered patios, one in Canada and one in Florida. We have a vinyl cover for the one in Florida that we put on when we leave town. The one in Canada comes off the wall mount in the winter and into storage. We don’t cover it.

Neither are special outdoor TVs, no issues in 5+ years with moisture, and it rains in absolute torrential downpours in Florida sometimes. As mentioned above, even under a covered patio, we have issues with brightness/glare but they’re not unusable, just not as great as the uber-pricey specialised outdoor TVs.

I would recommend just getting a cover for when you’re not using it and trying to be vigilant about keeping it covered in poor weather.