Most folks use Notability with its recording option, where what you write while recording is attached to the time mark of the recording. It allows you to tap on a note and jump to where the relevant information was said in the recording.
Goodnotes and CollabNotes (free but somewhat experimental) also have these features.
Another option to consider is Obsidian (free) which can link your notes together to make a personal Wikipedia-like network of notes. Many users swear by it, not at it. I've been using it to collect my note mess into a coherent whole, a never-ending work in progress.
Some Ph.D. grad students use Obsidian to manage their thesis notes. There are many videos on Obsidian on youtube.
A third option is the specialty notebooks, where a pen records what you wrote and can be uploaded to a computer later on.
Of course, the tried and true scheme is to write your notes in a simple notebook or fancier Moleskin notebook and then rewrite them elsewhere during quiet moments of reflection.