I made some progress and figured I would share some updates in the event that anyone runs into this issue. I found a Youtube tutorial to utilize Xroar for Coco Emulation on the PC. I had no installed the disk11.rom or the extbas11.rom. Based on the Retropie doc file, only the bas13.rom is mentioned so it might be worth a minor update.
Here is the Youtube video for reference if anyone would like.
I also ran into some issues with everything being in black and white but with some searching Ctrl-A resolved the issue.
Hopefully this helps someone down the road if they run into this.