Is it from the sunnah to raise the voice in remembrance (dhikr) after the prayer or not?
Shaykh Ṣāliḥ al-Fawzān:
Without a doubt, it is from the sunnah to raise the voice in remembrance (with dhikr) which has been narrated, words of remembrance have been narrated (to say) after the prayer. This is something which was present during the lifetime of the Prophet ﷺ and the lifetime of his companions. And the children and the youth, as Ibn ʿAbbās said: ‘We used to know that the prayer had ended by hearing the dhikr.’