Yep, the Roku Express 4K+ remote can handle your TV's volume and power. According to the manufacturer's description, it's called the Roku Voice Remote, and it lets you control both your TV and the Roku device all with one remote.
So, you can turn your TV on and off and adjust the volume without needing a second remote. This is a nice step up from some of the older Roku models that needed multiple remotes for those functions.
In our research, we've found that this feature makes the Roku Express 4K+ pretty popular because it adds a lot of convenience. However, there are some mixed experiences. Some people have had issues with the remote failing over time or needing replacements, which can be a bit costly.
There have also been a few reports of folks getting a different remote than what's described or having trouble setting it up.
Overall, though, most users seem to appreciate the ease of using one remote for everything. So, if you're after a simple and user-friendly streaming setup, the Roku Express 4K+ could be a good pick.