Most of the barriers are actually language and bureaucracy, not qualifications. Even skilled people with engineering and medical degrees go through the same challenges in Germany so they instead often choose to go to Anglophone countries, Netherlands, Singapore, etc where all engineering jobs are done in English and have minimal bureaucracy.
These problems combined with high taxes are are not good problems to have for a country trying to be attractive to foreign workers. With such stupid policies, they'll only attract low skilled workers. Refugees are different as they don't have a choice but at least you can accept their qualifications properly and give them a job equivalent to their skill level.
Take India, Netherlands and Singapore for example. English is not the native language of these countries but corporations often operate in English which makes them so much more welcoming to foreign talent.
Germany is playing by outdated rules. It needs to adapt, else it's might will suffer unfortunately.
Meh.. it's just gate keeping by locals. Many middle eastern graduates are very intelligent, especially in Medical, Engineering and Mathematics. Iranian doctors are very skilled.
Filipinos are extremely skilled in nursing and medical adjacent fields, something that ageing countries like Germany can absolutely use but bureaucracy means not many Filipinos are coming up Germany.
It's purely a language barrier and bureaucracy thing. It's a global world. Let's operate formally in English like how many companies in many countries default to.