I have a Roku streaming stick in my bedroom (And a deluxe in my livingroom). My issue is that the streaming stick is BEHIND the TV when installed and I have to reach my arm all the way out for the remote and device to connect. I need an extension of sorts to connect the device with the TV so that the signal is not blocked. Since it's HDMI, it may not be as easy to find as a USB extension is.
The extension from Roku is about 4 inches long. I'd guess you need something longer.
There's nothing special about the Roku HDMI extension, it's just a short cord with an HDMI plug at one end and an HDMI socket at the other. You may be able to find an HDMI extension locally and not have to wait for someone to ship it to you. Or order one of your desired length from Amazon or other source.
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