Are duas accepted at any time? If so, why are there specific times for acceptance such as in between

Assalamu alaikum, To my understanding, I have known that duas will be accepted any time one raises their hands and calls out to Allah SWT. Why are there then many Q&As informing about specific times in which duas will be accepted if they will be accepted any time one calls out to Allah SWT anyways? Does this mean if you call out to Allah outside of these specific times that your dua will not be answered? I know that Allah SWT says in the Quran that if one calls him and he will respond. And in addition many Hadith which say Allah will feel shy if his slave calls to him and Allah SWT doesn’t return anything. Why are there then specific times in which duas will be accepted, if they are already accepted the moment a slave calls out to Allah SWT? JazakAllah khair. Thank you very much for your help.