To help to make a deck anywhere easily and fast, AnkiMobile needs to support iOS Shortcuts considering its price on AppStore.
You can use url-schemes to create notes on iOS from other applications (URL Schemes - AnkiMobile Manual)
I don’t believe your suggestion link is proper to this topic, even if it were proper, I don’t like type so many stuffs in that manual touching each tiny keyboard on phone many times.
To make decks fast on mobile, it needs some automation.
You can automate the addition of content to Anki using these schemes and shortcuts.
You win.
I made an iOS Shortcut that clipboard or input goes to web dictionary input and Anki Front card and URL of web dictionary opens in Safari and goes to Anki {{URL}} field.
But I need the Shortcut to figure out the list of all decks of my Anki profile to select only one deck of them to make a card on playing the Shortcut.
You can do this too:
anki://x-callback-url/addnote?profile=User%201&type=SET NOTE TYPE HERE&deck=SET DECK HERE&fld…
You can implement a menu in Shortcuts where you list your decks and pick one.
That was I used and…
How to popup a deck list menu I made by running Shortcuts?