You don't. But even with a good haircut and trendy clothes when you are 50+ nobody is going to guess you're only 31. You can trim your CV to only show last 10 years, but the roles are somehow still a tell.

You don't disclose your age in the US either, but it's pretty easy to find via linkedin graduation dates, or just... looking at you. I think most companies just judge during the video screening.

Maybe we can have AI spruce up our video call avatars to be better looking and more mature. Haha.