That’s why recruiters use test projects. You got a task, few days to complete. And you send your test project to given company. You need to prove you’re able to create. That’s it.
If there’s no developer in recruiting team, any kind of ridiculous certificate won’t actually help to pick the best developer for a project/team.
Every person who done Unity certificate claims it’s a dump test, not checking anything useful. It’s like a test for a driver licence.
But such certificates work well if you want to charge other people to teach them Unity. Because you got “certificate of professionalism”.