@skry Hah, thanks! My eyes... 😅 This is actually an iPhone 6 image (so the original res for this image is only 2448x2448). I often don't do any explicit sharpening/unsharp-masking (only if in despair), but I generally do rely on minor denoising and use Lanczos filtering when downscaling images for posting online (together this has somewhat of a sharpening effect).
For B&W edits, I often spend most of the time tweaking the weights of the RGBCMY primaries for the grayscale conversion, as well as fiddling with curves to improve contrast & clarity. Sometimes I also use actual "clarity", but only ever subtly (before it starts causing halos)...
In this above image from 2021, I sometimes also re-add weak noise (to add more grain), which when later downscaled also seems to somewhat increase overall roughness/sharpness/texture, which I quite like sometimes...