What kind of antenna are you using - indoor or outdoor?
When we cut cable and got Roku, we bought a Mohu Leaf (apartment dwellers); it didn’t work well and doesn’t do much at all now.
I have a Winegard Metrostar 2000 amplified antenna (not sure they are available anymore). It’s in my attic and, when I dropped cable, I just switched the main input from comcast to my antenna - all my TVs work great.
It looks like a UFO in my attic and it’s been working for about 10 years.
I’m just outside of Houston and have a DVR to record the weird shows I like - like Perry Mason...