Assuming you do not have an Xbox One or Series console, do you happen to have a PC powerful enough to play whatever it is you would like to play on GamePass? Because most GamePass games are also on PC I'm pretty sure and GamePass covers both Xbox and PC. So if you have a good enough PC, try to find a way to feed the HDMI signal to your TV (find an adapter if needed, even a wireless adapter if needed).
If you have an iMac you can partition your drive and install Windows on it. Or you can install Windows onto an SSD and run it on your Mac via the SSD via USB enclosure, but note that you CANNOT install Windows onto an SSD via USB (so it has to be an internal SSD and Windows must be installed whilst said SSD is connected directly to the motherboard of a PC, and then it can be placed inside a USB enclose and run on an iMac via USB ONCE IT IS ALREADY INSTALLED. iMacs I think are typically pretty powerful and should be able to play a lot of games, but you will need to be running Windows. (don't go buy an iMac; buy a PC instead; this info is only for if you already have one).
