Trading gold in Diablo 4 on consoles is about to become a much smoother experience with the upcoming Season of the Construct.
Players who have encountered challenges in gold transactions on console versions will be pleased to know that the game developers have revamped the UI making gold trading more accessible and efficient than ever before.
DIABLO IV PATCH NOTES - (source)
The button for confirming Gold amount in the trade interface on controller has been changed to Yor Triangle on console. This will allow pressing A or X on console to bring up the virtual keyboard to manually enter Gold amounts when trading.
This is not the only Console fix according to the patch notes, they also fixed an issue where pressing X or Square on console would confirm the salvage of a Legendary or Unique Item.
Make sure to read the entire Diablo IV Patch Notes