I actually use Noctua fans - I think it’s just that the size of the fan itself, that makes it so it doesn’t require it to spin itself to death. Plus the vibration attachments (instead of using the screws), helps with the humming noise that most fans give off.
If you’re putting it in a case, it’s going to be hard to fit… but there are 3d printed fan adapters that people use…
I’m not sure how big the Radxa PoE hat fan is… but it LOOKS like 30mm… Noctua doesn’t make them that small… their smallest are the 40mm x 10mm fans, which I actually have quite a bit. Costs a lot more than a regular fan… and comes in an obnoxious box, but it’s super quiet (even at full speed) and cools really well.
Fan adapter: https://www.thingiverse.com/thing:2748800