Why are unscented after-shave so uncommon, most of after-shave I can find at a reasonable price have that typical cheap cologne smell which is going to wreck any perfume you wear.
But when looking in most shop, most of them still have some fragance in-it and often, so looks like that people shaving their face buy-it
This is the answer.
The more insidious bit?
Most manufacturers don’t actually know what’s in the masking fragrance, because they buy it from a third party who has no legal requirement to list the ingredients.
So even “unscented” products have this stuff in them that’s a mixture of perfume and preservative, the contents of which are a trade secret. There’s very few soap, deodorant and aftershave suppliers who actually know all the chemical contents of their products, and even fewer who are willing to share that information with the customer.