Adapters do exist that convert through-axle hubs to quick release. They will work if there's a particular wheelset you're looking at or, as I used them in my case, have a strange franken wheel project.

That said, it's generally not worth the squeeze. There are a great many wheels and hubs in different spacing, spoke count, colors, brake types, etc that are designed for quick release. Trying to adapt one not designed for your frame should be reserved for unusual circumstances. Consider these adapters only if you're ready to build a wheel from the ground up (a hub, a box of spokes, and a rim).

Also, don't fret too much about hub bearings. Cup and cone bearings are very efficient and are easily serviced. Case in point, Shimano didn't produce cartridge bearing hubs until 2023.