Device to convert IR commands to ST?

I recently upgraded a couple remotes to Harmony hubs and those work pretty good with ST. However, I have an old harmony 650 that only controls a couple devices in my bedroom and I’d like to add a lights on/off “button.” Is there a device that can receive IR commands from the 650 and translate/map them into ST commands, e.g. turn on a light with a designated button.

In my head, it seems like a simple thing, but results I’ve found online are either non-existent or old enough to not be relevant.

Any help or a point in the right direction would be great.

Keep me honest, but isn’t that so you can send ST commands to an IR device? I’m trying to do the opposite. Send IR commands to control a ST device.

Yes, you are right.