Roku Express Remote Doesn't Have A Power Button or Vooume Controls

I purchased a Roku Express unit to replace an Amazon Firestick. To my surprise, the Roku remote that came with the unit doesn't have a power on/off button or volume controls. I have to turn the TV on with the TV remote, select and change channels/apps with the Roku remote, and control the volume with the TV remote. Seems ridiculous to me that Roku doesn't have a remote comparable to the Amazon Firestick. Had I known I'd have to use two remotes to watch my TV I would have stuck with the Firestick, which worked just fine.

Roku's customer support team was no help. Their only comment over two separate chat sessions was they'd forward my concern to their product development team. That's not a solution. 

Does anyone know if there is a remote on the market I could purchase that would allow me to use a single remote unit instead of two? 

Thanks in advance for any help you can provide.