Ask HN: Are there good certificates for Developers?

I once was a working student of a cybersecurity company. they required for each new hire to complete the famous OSCP certificate within 3 months. they did that in order to make sure that their new hire is up for the task and probably because they can sell their services better to their clients. Now I run a WebDev agency of my own with partly frontend-devs, backend-devs, fullstack-devs and DevOps guys - There are known cloud-native-foundation certificates for DevOps guys as well as certificates for the major cloud providers (AWS, Azure, etc), but I didnt find any good ones for lets say react or nodejs devs. Since I want my employees to have a good coding standard/knowledge I thought of having such certificates for them as well, but I am still unsure whether its a good idea or rather a waste of time. are they well received in the western world (We are from germany)? does my favorite community has some thoughts on that topic?