What if you paint with exterior grade paint? That’s what I did in our kennel, I can wash when needed and it’s held up fine.

The interior walls of our kennel are hardiplank siding with exterior grade paint.

It may not be cool, but vinyl wallpaper is outrageously durable and scrubbable.

I like the ideas mentioned. Because of my bathroom/mudroom remodel 8 years ago now, I tiled it in 4x4 white simple tiles. I put epoxy grout in the spaces to prevent staining. My DH is a farmer, so the room sees dirt and grease. I ran my tile about 48" up the walls, with a crown on top. But if I thought that the upper areas were going to get dirt or grease on them, I would have gone higher. The tile wipes up very well.