Here's one of the better ones: https://www.amazon.com/ASUS-USB-BT500-Bluetooth-Backward-Compatible/dp/B08DFBNG7F   

A general problem with Bluetooth vs. wired is that the latency is higher. Exactly how much, and whether that is acceptable depends on how you intend to use it and what version of Bluetooth the Yamaha has. (Version 5 is capable of being much better than older versions in that regard, but still lags compared to wired.)

Reply to Thomas Cox:

I am not sure I know exactly what "latency" is. I'm guessing that it has to do with how well the midi data survives the wireless transmission. Is my guess accurate? My Yamaha digital piano is located about 20 feet away from my Dell PC.

Latency is the time delay between when you start an event and when it actually occurs. For example, you press a key on the MIDI keyboard, and it takes a bit of time before it makes a sound or note entry in Finale (or DAW, or whatever.) 

In a wired system, these delays can be as low as 3-10ms, which is generally not noticeable. With Bluetooth 4 and earlier,  though, 300-500ms isn't unusual. For audio playback only, that isn't a major problem, but if you are trying to play along to a click source, you could be an entire beat behind at m.m. 120.

With Bluetooth 5, if everything is just right*,  the latency can be as low as 34-40ms. That's a lot better (like a guitar delay pedal dialed to near minimum) but it can still be an issue.

* I'll skip the details - you can search for Bluetooth 5 and aptX LL if you are interested.