If you cannot click on the “Suggest a New Note” for a card you have created and want to upload to a deck. Then you are most likely using a note type that is incompatible with AnkiHub
Upon creation of an AnkiHub deck, a specific AnkiHub-compatible note type is created (signified by your username and deck name in brackets).
For example, to suggest a new note to the AnKing Step Deck. Cards must be created using the note type called "AnKingOverhaul (AnKing / AnKingMed)
To check what note type the card you created is using. Right click on the card and click info.
You can change the note type you use by right-clicking on the card → notes → change note type → select the AnkiHub compatible note type
Red box: AnkiHub-incompatible note type
Green box: AnkiHub compatible note type
If you are using the correct note AnkiHub-compatible note type, then your suggest a new note will look like this
The same principle applies to your own personal decks you have created!