Most American bathrooms you have a combo tub/shower. Since you have to step over the side of the tub to take a shower that’s not what many people consider a “walk-in” shower. In higher-end, generally newer construction sometimes they’ll have a separate shower and tub. Bathrooms with just a shower are somewhat uncommon. If you see a 3/4 bath listed in a house that’s a bathroom with just a shower and no tub.

I’ve considered getting rid of my tub and just having a shower as I never use the tub part, but as I only have one full bathroom supposedly having a house with no tub hurts the resale value. I might do it anyway, but also what I have is working fine and I’m lazy.